All tasks are done!

2025.03.14/01Ex/init_f.c

@@ -1,5 +1,5 @@
 #include "init_f.h"
-#include <math.h>
+#include <stdlib.h>
 
 #define MAX(n, m) (n < m ? m : n)
 

2025.03.14/01Ex/io_status.h

@@ -7,8 +7,7 @@ typedef enum _io_status
 {
 	SUCCESS,
 	ERROR_OPEN,
-	ERROR_READ,
-	ERROR_MEM
+	ERROR_READ
 } io_status;
 
 #endif

2025.03.14/01Ex/main.c

@@ -51,7 +51,7 @@ int main(int argc, char *argv[])
 		} while (0);
 	} else init_matrix(a, n, m, k);
 
-	printf("Initial matrix:\n");
+	printf("Matrix:\n");
 	print_matrix(a, n, m, p);
 
 	t = clock();

2025.03.14/02Ex/init_f.c

@@ -1,5 +1,5 @@
 #include "init_f.h"
-#include <math.h>
+#include <stdlib.h>
 
 #define MAX(n, m) (n < m ? m : n)
 

2025.03.14/02Ex/io_status.h

@@ -7,8 +7,7 @@ typedef enum _io_status
 {
 	SUCCESS,
 	ERROR_OPEN,
-	ERROR_READ,
-	ERROR_MEM
+	ERROR_READ
 } io_status;
 
 #endif

2025.03.14/02Ex/main.c

@@ -51,7 +51,7 @@ int main(int argc, char *argv[])
 		} while (0);
 	} else init_matrix(a, n, m, k);
 
-	printf("Initial matrix:\n");
+	printf("Matrix:\n");
 	print_matrix(a, n, m, p);
 
 	t = clock();

2025.03.14/03Ex/init_f.c

@@ -1,5 +1,5 @@
 #include "init_f.h"
-#include <math.h>
+#include <stdlib.h>
 
 #define MAX(n, m) (n < m ? m : n)
 

2025.03.14/03Ex/io_status.h

@@ -7,8 +7,7 @@ typedef enum _io_status
 {
 	SUCCESS,
 	ERROR_OPEN,
-	ERROR_READ,
-	ERROR_MEM
+	ERROR_READ
 } io_status;
 
 #endif

2025.03.14/03Ex/main.c

@@ -140,7 +140,7 @@ int main(int argc, char *argv[])
 	} 
 	else init_matrix(x, m, 1, k_x);
 
-	printf("Initial matrix A:\n");
+	printf("Matrix:\n");
 	print_matrix(a, n, m, p);
 	printf("Initial vector b:\n");
 	print_matrix(b, n, 1, p);

2025.03.14/04Ex/init_f.c

@@ -1,5 +1,5 @@
 #include "init_f.h"
-#include <math.h>
+#include <stdlib.h>
 
 #define MAX(n, m) (n < m ? m : n)
 

2025.03.14/04Ex/io_status.h

@@ -7,8 +7,7 @@ typedef enum _io_status
 {
 	SUCCESS,
 	ERROR_OPEN,
-	ERROR_READ,
-	ERROR_MEM
+	ERROR_READ
 } io_status;
 
 #endif

2025.03.14/04Ex/main.c

@@ -140,7 +140,7 @@ int main(int argc, char *argv[])
 	} 
 	else init_matrix(x, m, 1, k_x);
 
-	printf("Initial matrix A:\n");
+	printf("Matrix:\n");
 	print_matrix(a, n, m, p);
 	printf("Initial vector b:\n");
 	print_matrix(b, n, 1, p);

2025.03.14/05Ex/init_f.c

@@ -0,0 +1,30 @@
+#include "init_f.h"
+#include <stdlib.h>
+
+#define MAX(n, m) (n < m ? m : n)
+
+double f1(int n, int m, int i, int j)
+{
+	return MAX(n, m) - MAX(i, j) + 1;
+}
+
+double f2(int n, int m, int i, int j)
+{
+	(void)n;
+	(void)m;
+	return MAX(i, j);
+}
+
+double f3(int n, int m, int i, int j)
+{
+	(void)n;
+	(void)m;
+	return abs(i - j);
+}
+
+double f4(int n, int m, int i, int j)
+{
+	(void)n;
+	(void)m;
+	return 1./(i+j-1);
+}

2025.03.14/05Ex/io_status.h

@@ -0,0 +1,13 @@
+#ifndef IO_STATUS_H
+#define IO_STATUS_H
+
+#define LEN 1234
+
+typedef enum _io_status
+{
+	SUCCESS,
+	ERROR_OPEN,
+	ERROR_READ
+} io_status;
+
+#endif

2025.03.14/05Ex/main.c

@@ -92,13 +92,13 @@ int main(int argc, char *argv[])
 		} while (0);
 	} else init_matrix(b, m, n, k_b);
 
-	printf("Initial matrix A:\n");
+	printf("Matrix A:\n");
 	print_matrix(a, n, m, p);
-	printf("Initial matrix b:\n");
+	printf("Matrix B:\n");
 	print_matrix(b, m, n, p);
 
 	t = clock();
-	t5_solve(a, b, n, m);
+	res = t5_solve(a, b, n, m);
 	t = (clock() - t) / CLOCKS_PER_SEC;
 
 	printf ("%s : Task = %d Result = %e Elapsed = %.2f\n", argv[0], task, res, t);

2025.03.14/06Ex/a.txt

@@ -0,0 +1,5 @@
+1 2 3 4
+4 3 2 1
+1 2 3 4
+4 3 2 1
+1 2 3 4

2025.03.14/06Ex/b.txt

@@ -0,0 +1,4 @@
+1
+2
+3
+4

2025.03.14/06Ex/init_f.c

@@ -0,0 +1,30 @@
+#include "init_f.h"
+#include <stdlib.h>
+
+#define MAX(n, m) (n < m ? m : n)
+
+double f1(int n, int m, int i, int j)
+{
+	return MAX(n, m) - MAX(i, j) + 1;
+}
+
+double f2(int n, int m, int i, int j)
+{
+	(void)n;
+	(void)m;
+	return MAX(i, j);
+}
+
+double f3(int n, int m, int i, int j)
+{
+	(void)n;
+	(void)m;
+	return abs(i - j);
+}
+
+double f4(int n, int m, int i, int j)
+{
+	(void)n;
+	(void)m;
+	return 1./(i+j-1);
+}

2025.03.14/06Ex/init_f.h

@@ -0,0 +1,9 @@
+#ifndef INIT_F_H
+#define INIT_F_H
+
+double f1(int n, int m, int i, int j);
+double f2(int n, int m, int i, int j);
+double f3(int n, int m, int i, int j);
+double f4(int n, int m, int i, int j);
+
+#endif

2025.03.14/06Ex/io_status.h

@@ -0,0 +1,13 @@
+#ifndef IO_STATUS_H
+#define IO_STATUS_H
+
+#define LEN 1234
+
+typedef enum _io_status
+{
+	SUCCESS,
+	ERROR_OPEN,
+	ERROR_READ
+} io_status;
+
+#endif

2025.03.14/06Ex/main.c

@@ -0,0 +1,110 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include "array_io.h"
+#include "io_status.h"
+#include "solve.h"
+
+/* ./a.out n m p k_a [filename_a] k_b [filename_b] */
+int main(int argc, char *argv[])
+{
+	double t, res, *a, *b;
+	int n, m, p, k_a, k_b, task = 6;
+	char *name_a = 0, *name_b = 0;
+	if (!((argc == 6 || argc == 7 || argc == 8) && 
+				sscanf(argv[1], "%d", &n) == 1 && 
+				sscanf(argv[2], "%d", &m) == 1 && 
+				sscanf(argv[3], "%d", &p) == 1 && 
+				sscanf(argv[4], "%d", &k_a) == 1 && 
+				(k_a >= 0 && k_a <= 4) &&
+				(!(k_a == 0 && argc == 6)) && 
+				((k_a == 0 && sscanf(argv[6], "%d", &k_b) == 1) || 
+				 (k_a != 0 && sscanf(argv[5], "%d", &k_b) == 1)) &&
+				(k_b >= 0 && k_b <= 4) && 
+				(!(k_b == 0 && argc == 6)) && 
+				(!((k_a == 0 && k_b == 0) && argc != 8))))
+	{
+		printf("Usage: %s n m p k_a [filename_a] k_b [filename_b]\n", argv[0]);
+		return 1;
+	}
+	if (argc != 6) 
+	{
+		int i_b = 6;
+		if (k_a == 0) {name_a = argv[5];i_b++;}
+		if (k_b == 0) name_b = argv[i_b];
+	}
+
+	a = (double *)malloc(n * m * sizeof(double));
+	if (!a)
+	{
+		printf("Not enough memory\n");
+		return 2;
+	}
+	b = (double *)malloc(m * n * sizeof(double));
+	if (!b)
+	{
+		free(a);
+		printf("Not enough memory\n");
+		return 2;
+	}
+
+	if (name_a)
+	{ /* из файла */
+		io_status ret;
+		ret = read_matrix(a, n, m, name_a);
+		do {
+			switch (ret)
+			{
+				case SUCCESS:
+					continue;
+				case ERROR_OPEN:
+					printf("Cannot open %s\n", name_a);
+					break;
+				case ERROR_READ:
+					printf("Cannot read %s\n", name_a);
+					break;
+			}
+			free(a);
+			free(b);
+			return 3;
+		} while (0);
+	} else init_matrix(a, n, m, k_a);
+
+	if (name_b)
+	{
+		io_status ret;
+		ret = read_matrix(b, m, n, name_b);
+		do {
+			switch (ret)
+			{
+				case SUCCESS:
+					continue;
+				case ERROR_OPEN:
+					printf("Cannot open %s\n", name_b);
+					break;
+				case ERROR_READ:
+					printf("Cannot read %s\n", name_b);
+					break;
+			}
+			free(a);
+			free(b);
+			return 3;
+		} while (0);
+	} else init_matrix(b, m, n, k_b);
+
+	printf("Matrix A:\n");
+	print_matrix(a, n, m, p);
+	printf("Matrix B:\n");
+	print_matrix(b, m, n, p);
+
+	t = clock();
+	res = t6_solve(a, b, n, m);
+	t = (clock() - t) / CLOCKS_PER_SEC;
+
+	printf ("%s : Task = %d Result = %e Elapsed = %.2f\n", argv[0], task, res, t);
+
+	free(a);
+	free(b);
+
+	return 0;
+}

2025.03.14/06Ex/solve.c

@@ -0,0 +1,38 @@
+#include "solve.h"
+#include "math.h"
+
+#define eps 1e-9
+
+int compare(const double a, const double b)
+{
+	if (a - b > eps) return 1;
+	else if (b - a > eps) return -1;
+	return 0;
+}
+
+double t6_solve(const double *A, const double *b, int n, int m)
+{
+	double temp, summa, maximum = 0;
+	int i, j, k;
+
+	if (n <= 0 || m <= 0) return 0;
+
+
+	for (k = 0; k < n; k++) 
+	{
+		summa = 0;
+		for (i = 0; i < n; i++)
+		{
+			temp = 0;
+			for (j = 0; j < m; j++)
+				temp += A[i * m + j] * b[j * n + k];
+
+			if (k == i) temp--;
+			summa += fabs(temp);
+		}
+		if (compare(summa, maximum) == 1) maximum = summa;		
+	}
+
+	return maximum;
+}
+

2025.03.14/06Ex/solve.h

@@ -0,0 +1,7 @@
+#ifndef SOLVE_H
+#define SOLVE_H
+
+int compare(const double a, const double b);
+double t6_solve(const double *A, const double *b, int n, int m);
+
+#endif

2025.03.14/07Ex/array_io.c

@@ -0,0 +1,40 @@
+#include <stdio.h>
+#include "array_io.h"
+
+io_status read_matrix(double *a, int n, int m, const char *name)
+{
+	int i, j;
+	FILE *fp;
+	if (!(fp = fopen(name, "r"))) return ERROR_OPEN;
+	for (i = 0; i < n; i++)
+		for (j = 0; j < m; j++)
+			if (fscanf(fp, "%lf", a + i * m + j) != 1) 
+				{fclose(fp); return ERROR_READ;}
+	fclose(fp);
+	return SUCCESS;
+}
+
+void print_matrix(const double *a, int n, int m, int p)
+{
+	int np = (n > p ? p : n);
+	int mp = (m > p ? p : m);
+	int i, j;
+
+	for (i = 0; i < np; i++)
+	{
+		for (j = 0; j < mp; j++)
+			printf(" %10.3e", a[i * m + j]);
+		printf("\n");
+	}
+}
+
+void init_matrix(double *a, int n, int m, int k)
+{
+	double (*q)(int, int, int, int);
+	double (*f[])(int, int, int, int) = {f1, f2, f3, f4};
+	int i, j;
+	q = f[k-1];
+	for (i = 0; i < n; i++)
+		for (j = 0; j < m; j++)
+			a[i * m + j] = q(n, m, i+1, j+1);
+}

2025.03.14/07Ex/array_io.h

@@ -0,0 +1,11 @@
+#ifndef ARRAY_IO_H
+#define ARRAY_IO_H
+
+#include "io_status.h"
+#include "init_f.h"
+
+io_status read_matrix(double *a, int n, int m, const char *name);
+void print_matrix(const double *a, int n, int m, int p);
+void init_matrix(double *a, int n, int m, int k);
+
+#endif

2025.03.14/07Ex/init_f.c

@@ -0,0 +1,30 @@
+#include "init_f.h"
+#include <stdlib.h>
+
+#define MAX(n, m) (n < m ? m : n)
+
+double f1(int n, int m, int i, int j)
+{
+	return MAX(n, m) - MAX(i, j) + 1;
+}
+
+double f2(int n, int m, int i, int j)
+{
+	(void)n;
+	(void)m;
+	return MAX(i, j);
+}
+
+double f3(int n, int m, int i, int j)
+{
+	(void)n;
+	(void)m;
+	return abs(i - j);
+}
+
+double f4(int n, int m, int i, int j)
+{
+	(void)n;
+	(void)m;
+	return 1./(i+j-1);
+}

2025.03.14/07Ex/init_f.h

@@ -0,0 +1,9 @@
+#ifndef INIT_F_H
+#define INIT_F_H
+
+double f1(int n, int m, int i, int j);
+double f2(int n, int m, int i, int j);
+double f3(int n, int m, int i, int j);
+double f4(int n, int m, int i, int j);
+
+#endif

2025.03.14/07Ex/io_status.h

@@ -0,0 +1,13 @@
+#ifndef IO_STATUS_H
+#define IO_STATUS_H
+
+#define LEN 1234
+
+typedef enum _io_status
+{
+	SUCCESS,
+	ERROR_OPEN,
+	ERROR_READ
+} io_status;
+
+#endif

2025.03.14/07Ex/main.c

@@ -0,0 +1,67 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include "array_io.h"
+#include "io_status.h"
+#include "solve.h"
+
+/* ./a.out n m p k [filename] */
+int main(int argc, char *argv[])
+{
+	double t, res, *a;
+	int n, m, p, k, task = 7;
+	char *name = 0;
+	
+	if (!((argc == 5 || argc == 6) && 
+				sscanf(argv[1], "%d", &n) == 1 && 
+				sscanf(argv[2], "%d", &m) == 1 && 
+				sscanf(argv[3], "%d", &p) == 1 &&
+				sscanf(argv[4], "%d", &k) == 1 &&
+				k >= 0 && k <= 4 && (!(k == 0 && argc != 6))))
+	{
+		printf("Usage: %s n m p k [filename]\n", argv[0]);
+		return 1;
+	}
+	if (argc == 6) name = argv[5];
+	
+	a = (double *)malloc(n * m * sizeof(double));
+	if (!a)
+	{
+		printf("Not enough memory\n");
+		return 2;
+	}
+
+	if (name)
+	{ /* из файла */
+		io_status ret;
+		ret = read_matrix(a, n, m, name);
+		do {
+			switch (ret)
+			{
+				case SUCCESS:
+					continue;
+				case ERROR_OPEN:
+					printf("Cannot open %s\n", name);
+					break;
+				case ERROR_READ:
+					printf("Cannot read %s\n", name);
+			}
+			free(a);
+			return 3;
+		} while (0);
+	} else init_matrix(a, n, m, k);
+
+	printf("Matrix:\n");
+	print_matrix(a, n, m, p);
+
+	t = clock();
+	res = t7_solve(a, n, m);
+	t = (clock() - t) / CLOCKS_PER_SEC;
+
+	printf("New matrix:\n");
+	print_matrix(a, n, m, p);
+	printf ("%s : Task = %d Result = %e Elapsed = %.2f\n", argv[0], task, res, t);
+	
+	free(a);
+	return 0;
+}

2025.03.14/07Ex/solve.c

@@ -0,0 +1,32 @@
+#include "solve.h"
+#include <math.h>
+
+#define eps 1e-9
+
+int compare(const double a, const double b)
+{
+	if (a - b > eps) return 1;
+	else if (b - a > eps) return -1;
+	return 0;
+}
+
+double t7_solve(double *a, int n, int m)
+{
+	int i, j;
+	double cur = 0, maximum = 0;
+	for (i = 0; i < n; i++)
+		for (j = 0; j < m; j++)
+			if (i == 0 || i == n-1 || j == 0 || j == m-1)
+				if (compare(fabs(a[i*m + j]), maximum) == 1)
+					maximum = fabs(a[i*m + j]);
+	
+	for (i = 1; i < n-1; i++)
+		for (j = 1; j < m-1; j++)
+		{
+			cur = (a[(i-1)*m + j] + a[(i+1)*m + j] + a[i*m + (j-1)] + a[i*m + (j+1)]) / 5;
+			if (compare(fabs(cur), maximum) == 1) maximum = fabs(cur);
+			a[i*m + j] = cur;
+		}
+
+	return maximum;
+}

2025.03.14/07Ex/solve.h

@@ -0,0 +1,7 @@
+#ifndef SOLVE_H
+#define SOLVE_H
+
+int compare(const double a, const double b);
+double t7_solve(double *a, int n, int m);
+
+#endif

2025.03.14/07Ex/t.txt

@@ -0,0 +1,5 @@
+1 2 3 4
+5 6 7 8
+9 10 11 12
+13 14 15 16
+17 18 19 20

2025.03.14/08Ex/a.txt

@@ -0,0 +1,3 @@
+1 2 3 4
+1 1 1 1
+2 2 2 2

2025.03.14/08Ex/array_io.c

@@ -0,0 +1,40 @@
+#include <stdio.h>
+#include "array_io.h"
+
+io_status read_matrix(double *a, int n, int m, const char *name)
+{
+	int i, j;
+	FILE *fp;
+	if (!(fp = fopen(name, "r"))) return ERROR_OPEN;
+	for (i = 0; i < n; i++)
+		for (j = 0; j < m; j++)
+			if (fscanf(fp, "%lf", a + i * m + j) != 1) 
+				{fclose(fp); return ERROR_READ;}
+	fclose(fp);
+	return SUCCESS;
+}
+
+void print_matrix(const double *a, int n, int m, int p)
+{
+	int np = (n > p ? p : n);
+	int mp = (m > p ? p : m);
+	int i, j;
+
+	for (i = 0; i < np; i++)
+	{
+		for (j = 0; j < mp; j++)
+			printf(" %10.3e", a[i * m + j]);
+		printf("\n");
+	}
+}
+
+void init_matrix(double *a, int n, int m, int k)
+{
+	double (*q)(int, int, int, int);
+	double (*f[])(int, int, int, int) = {f1, f2, f3, f4};
+	int i, j;
+	q = f[k-1];
+	for (i = 0; i < n; i++)
+		for (j = 0; j < m; j++)
+			a[i * m + j] = q(n, m, i+1, j+1);
+}

2025.03.14/08Ex/array_io.h

@@ -0,0 +1,11 @@
+#ifndef ARRAY_IO_H
+#define ARRAY_IO_H
+
+#include "io_status.h"
+#include "init_f.h"
+
+io_status read_matrix(double *a, int n, int m, const char *name);
+void print_matrix(const double *a, int n, int m, int p);
+void init_matrix(double *a, int n, int m, int k);
+
+#endif

2025.03.14/08Ex/init_f.c

@@ -0,0 +1,30 @@
+#include "init_f.h"
+#include <stdlib.h>
+
+#define MAX(n, m) (n < m ? m : n)
+
+double f1(int n, int m, int i, int j)
+{
+	return MAX(n, m) - MAX(i, j) + 1;
+}
+
+double f2(int n, int m, int i, int j)
+{
+	(void)n;
+	(void)m;
+	return MAX(i, j);
+}
+
+double f3(int n, int m, int i, int j)
+{
+	(void)n;
+	(void)m;
+	return abs(i - j);
+}
+
+double f4(int n, int m, int i, int j)
+{
+	(void)n;
+	(void)m;
+	return 1./(i+j-1);
+}

2025.03.14/08Ex/init_f.h

@@ -0,0 +1,9 @@
+#ifndef INIT_F_H
+#define INIT_F_H
+
+double f1(int n, int m, int i, int j);
+double f2(int n, int m, int i, int j);
+double f3(int n, int m, int i, int j);
+double f4(int n, int m, int i, int j);
+
+#endif

2025.03.14/08Ex/io_status.h

@@ -0,0 +1,13 @@
+#ifndef IO_STATUS_H
+#define IO_STATUS_H
+
+#define LEN 1234
+
+typedef enum _io_status
+{
+	SUCCESS,
+	ERROR_OPEN,
+	ERROR_READ
+} io_status;
+
+#endif

2025.03.14/08Ex/main.c

@@ -0,0 +1,67 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include "array_io.h"
+#include "io_status.h"
+#include "solve.h"
+
+/* ./a.out n m p k [filename] */
+int main(int argc, char *argv[])
+{
+	double t, res, *a;
+	int n, m, p, k, task = 8;
+	char *name = 0;
+	
+	if (!((argc == 5 || argc == 6) && 
+				sscanf(argv[1], "%d", &n) == 1 && 
+				sscanf(argv[2], "%d", &m) == 1 && 
+				sscanf(argv[3], "%d", &p) == 1 &&
+				sscanf(argv[4], "%d", &k) == 1 &&
+				k >= 0 && k <= 4 && (!(k == 0 && argc != 6))))
+	{
+		printf("Usage: %s n m p k [filename]\n", argv[0]);
+		return 1;
+	}
+	if (argc == 6) name = argv[5];
+	
+	a = (double *)malloc(n * m * sizeof(double));
+	if (!a)
+	{
+		printf("Not enough memory\n");
+		return 2;
+	}
+
+	if (name)
+	{ /* из файла */
+		io_status ret;
+		ret = read_matrix(a, n, m, name);
+		do {
+			switch (ret)
+			{
+				case SUCCESS:
+					continue;
+				case ERROR_OPEN:
+					printf("Cannot open %s\n", name);
+					break;
+				case ERROR_READ:
+					printf("Cannot read %s\n", name);
+			}
+			free(a);
+			return 3;
+		} while (0);
+	} else init_matrix(a, n, m, k);
+
+	printf("Matrix:\n");
+	print_matrix(a, n, m, p);
+
+	t = clock();
+	res = t8_solve(a, n, m);
+	t = (clock() - t) / CLOCKS_PER_SEC;
+
+	printf("New matrix:\n");
+	print_matrix(a, n, m, p);
+	printf ("%s : Task = %d Result = %e Elapsed = %.2f\n", argv[0], task, res, t);
+	
+	free(a);
+	return 0;
+}

2025.03.14/08Ex/solve.c

@@ -0,0 +1,32 @@
+#include "solve.h"
+#include <math.h>
+
+#define eps 1e-9
+
+int compare(const double a, const double b)
+{
+	if (a - b > eps) return 1;
+	else if (b - a > eps) return -1;
+	return 0;
+}
+
+double t8_solve(double *a, int n, int m)
+{
+	int i, j;
+	double cur = 0, maximum = 0;
+	for (i = 0; i < n; i++)
+		for (j = 0; j < m; j++)
+			if (i == 0 || i == n-1 || j == 0 || j == m-1)
+				if (compare(fabs(a[i*m + j]), maximum) == 1)
+					maximum = fabs(a[i*m + j]);
+	
+	for (i = n-2; i > 0; i--)
+		for (j = m-2; j > 0; j--)
+		{
+			cur = (a[(i+1)*m + j] + a[(i-1)*m + j] + a[i*m + (j-1)] + a[i*m + (j+1)]) / 5;
+			if (compare(fabs(cur), maximum) == 1) maximum = fabs(cur);
+			a[i*m + j] = cur;
+		}
+
+	return maximum;
+}

2025.03.14/08Ex/solve.h

@@ -0,0 +1,7 @@
+#ifndef SOLVE_H
+#define SOLVE_H
+
+int compare(const double a, const double b);
+double t8_solve(double *a, int n, int m);
+
+#endif

2025.03.14/09Ex/a.txt

@@ -0,0 +1,3 @@
+1 2 3 4
+1 1 1 1
+2 2 2 2

2025.03.14/09Ex/array_io.c

@@ -0,0 +1,40 @@
+#include <stdio.h>
+#include "array_io.h"
+
+io_status read_matrix(double *a, int n, int m, const char *name)
+{
+	int i, j;
+	FILE *fp;
+	if (!(fp = fopen(name, "r"))) return ERROR_OPEN;
+	for (i = 0; i < n; i++)
+		for (j = 0; j < m; j++)
+			if (fscanf(fp, "%lf", a + i * m + j) != 1) 
+				{fclose(fp); return ERROR_READ;}
+	fclose(fp);
+	return SUCCESS;
+}
+
+void print_matrix(const double *a, int n, int m, int p)
+{
+	int np = (n > p ? p : n);
+	int mp = (m > p ? p : m);
+	int i, j;
+
+	for (i = 0; i < np; i++)
+	{
+		for (j = 0; j < mp; j++)
+			printf(" %10.3e", a[i * m + j]);
+		printf("\n");
+	}
+}
+
+void init_matrix(double *a, int n, int m, int k)
+{
+	double (*q)(int, int, int, int);
+	double (*f[])(int, int, int, int) = {f1, f2, f3, f4};
+	int i, j;
+	q = f[k-1];
+	for (i = 0; i < n; i++)
+		for (j = 0; j < m; j++)
+			a[i * m + j] = q(n, m, i+1, j+1);
+}

2025.03.14/09Ex/array_io.h

@@ -0,0 +1,11 @@
+#ifndef ARRAY_IO_H
+#define ARRAY_IO_H
+
+#include "io_status.h"
+#include "init_f.h"
+
+io_status read_matrix(double *a, int n, int m, const char *name);
+void print_matrix(const double *a, int n, int m, int p);
+void init_matrix(double *a, int n, int m, int k);
+
+#endif

2025.03.14/09Ex/init_f.c

@@ -0,0 +1,30 @@
+#include "init_f.h"
+#include <stdlib.h>
+
+#define MAX(n, m) (n < m ? m : n)
+
+double f1(int n, int m, int i, int j)
+{
+	return MAX(n, m) - MAX(i, j) + 1;
+}
+
+double f2(int n, int m, int i, int j)
+{
+	(void)n;
+	(void)m;
+	return MAX(i, j);
+}
+
+double f3(int n, int m, int i, int j)
+{
+	(void)n;
+	(void)m;
+	return abs(i - j);
+}
+
+double f4(int n, int m, int i, int j)
+{
+	(void)n;
+	(void)m;
+	return 1./(i+j-1);
+}

2025.03.14/09Ex/init_f.h

@@ -0,0 +1,9 @@
+#ifndef INIT_F_H
+#define INIT_F_H
+
+double f1(int n, int m, int i, int j);
+double f2(int n, int m, int i, int j);
+double f3(int n, int m, int i, int j);
+double f4(int n, int m, int i, int j);
+
+#endif

2025.03.14/09Ex/io_status.h

@@ -0,0 +1,13 @@
+#ifndef IO_STATUS_H
+#define IO_STATUS_H
+
+#define LEN 1234
+
+typedef enum _io_status
+{
+	SUCCESS,
+	ERROR_OPEN,
+	ERROR_READ
+} io_status;
+
+#endif

2025.03.14/09Ex/main.c

@@ -0,0 +1,67 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include "array_io.h"
+#include "io_status.h"
+#include "solve.h"
+
+/* ./a.out n m p k [filename] */
+int main(int argc, char *argv[])
+{
+	double t, res, *a;
+	int n, m, p, k, task = 9;
+	char *name = 0;
+	
+	if (!((argc == 5 || argc == 6) && 
+				sscanf(argv[1], "%d", &n) == 1 && 
+				sscanf(argv[2], "%d", &m) == 1 && 
+				sscanf(argv[3], "%d", &p) == 1 &&
+				sscanf(argv[4], "%d", &k) == 1 &&
+				k >= 0 && k <= 4 && (!(k == 0 && argc != 6))))
+	{
+		printf("Usage: %s n m p k [filename]\n", argv[0]);
+		return 1;
+	}
+	if (argc == 6) name = argv[5];
+	
+	a = (double *)malloc(n * m * sizeof(double));
+	if (!a)
+	{
+		printf("Not enough memory\n");
+		return 2;
+	}
+
+	if (name)
+	{ /* из файла */
+		io_status ret;
+		ret = read_matrix(a, n, m, name);
+		do {
+			switch (ret)
+			{
+				case SUCCESS:
+					continue;
+				case ERROR_OPEN:
+					printf("Cannot open %s\n", name);
+					break;
+				case ERROR_READ:
+					printf("Cannot read %s\n", name);
+			}
+			free(a);
+			return 3;
+		} while (0);
+	} else init_matrix(a, n, m, k);
+
+	printf("Matrix:\n");
+	print_matrix(a, n, m, p);
+
+	t = clock();
+	res = t9_solve(a, n, m);
+	t = (clock() - t) / CLOCKS_PER_SEC;
+
+	printf("New matrix:\n");
+	print_matrix(a, n, m, p);
+	printf ("%s : Task = %d Result = %e Elapsed = %.2f\n", argv[0], task, res, t);
+	
+	free(a);
+	return 0;
+}

2025.03.14/09Ex/solve.c

@@ -0,0 +1,32 @@
+#include "solve.h"
+#include <math.h>
+
+#define eps 1e-9
+
+int compare(const double a, const double b)
+{
+	if (a - b > eps) return 1;
+	else if (b - a > eps) return -1;
+	return 0;
+}
+
+double t9_solve(double *a, int n, int m)
+{
+	int i, j;
+	double cur = 0, maximum = 0;
+	for (i = 0; i < n; i++)
+		for (j = 0; j < m; j++)
+			if (i == 0 || i == n-1 || j == 0 || j == m-1)
+				if (compare(fabs(a[i*m + j]), maximum) == 1)
+					maximum = fabs(a[i*m + j]);
+	
+	for (i = 1; i < n-1; i++)
+		for (j = m-2; j > 0; j--)
+		{
+			cur = (a[(i-1)*m + j] + a[(i+1)*m + j] + a[i*m + (j-1)] + a[i*m + (j+1)]) / 5;
+			if (compare(fabs(cur), maximum) == 1) maximum = fabs(cur);
+			a[i*m + j] = cur;
+		}
+
+	return maximum;
+}

2025.03.14/09Ex/solve.h

@@ -0,0 +1,7 @@
+#ifndef SOLVE_H
+#define SOLVE_H
+
+int compare(const double a, const double b);
+double t9_solve(double *a, int n, int m);
+
+#endif

2025.03.14/10Ex/a.txt

@@ -0,0 +1,3 @@
+1 2 3 4
+1 1 1 1
+2 2 2 2

2025.03.14/10Ex/array_io.c

@@ -0,0 +1,40 @@
+#include <stdio.h>
+#include "array_io.h"
+
+io_status read_matrix(double *a, int n, int m, const char *name)
+{
+	int i, j;
+	FILE *fp;
+	if (!(fp = fopen(name, "r"))) return ERROR_OPEN;
+	for (i = 0; i < n; i++)
+		for (j = 0; j < m; j++)
+			if (fscanf(fp, "%lf", a + i * m + j) != 1) 
+				{fclose(fp); return ERROR_READ;}
+	fclose(fp);
+	return SUCCESS;
+}
+
+void print_matrix(const double *a, int n, int m, int p)
+{
+	int np = (n > p ? p : n);
+	int mp = (m > p ? p : m);
+	int i, j;
+
+	for (i = 0; i < np; i++)
+	{
+		for (j = 0; j < mp; j++)
+			printf(" %10.3e", a[i * m + j]);
+		printf("\n");
+	}
+}
+
+void init_matrix(double *a, int n, int m, int k)
+{
+	double (*q)(int, int, int, int);
+	double (*f[])(int, int, int, int) = {f1, f2, f3, f4};
+	int i, j;
+	q = f[k-1];
+	for (i = 0; i < n; i++)
+		for (j = 0; j < m; j++)
+			a[i * m + j] = q(n, m, i+1, j+1);
+}

2025.03.14/10Ex/array_io.h

@@ -0,0 +1,11 @@
+#ifndef ARRAY_IO_H
+#define ARRAY_IO_H
+
+#include "io_status.h"
+#include "init_f.h"
+
+io_status read_matrix(double *a, int n, int m, const char *name);
+void print_matrix(const double *a, int n, int m, int p);
+void init_matrix(double *a, int n, int m, int k);
+
+#endif

2025.03.14/10Ex/init_f.c

@@ -0,0 +1,30 @@
+#include "init_f.h"
+#include <stdlib.h>
+
+#define MAX(n, m) (n < m ? m : n)
+
+double f1(int n, int m, int i, int j)
+{
+	return MAX(n, m) - MAX(i, j) + 1;
+}
+
+double f2(int n, int m, int i, int j)
+{
+	(void)n;
+	(void)m;
+	return MAX(i, j);
+}
+
+double f3(int n, int m, int i, int j)
+{
+	(void)n;
+	(void)m;
+	return abs(i - j);
+}
+
+double f4(int n, int m, int i, int j)
+{
+	(void)n;
+	(void)m;
+	return 1./(i+j-1);
+}

2025.03.14/10Ex/init_f.h

@@ -0,0 +1,9 @@
+#ifndef INIT_F_H
+#define INIT_F_H
+
+double f1(int n, int m, int i, int j);
+double f2(int n, int m, int i, int j);
+double f3(int n, int m, int i, int j);
+double f4(int n, int m, int i, int j);
+
+#endif

2025.03.14/10Ex/io_status.h

@@ -0,0 +1,13 @@
+#ifndef IO_STATUS_H
+#define IO_STATUS_H
+
+#define LEN 1234
+
+typedef enum _io_status
+{
+	SUCCESS,
+	ERROR_OPEN,
+	ERROR_READ
+} io_status;
+
+#endif

2025.03.14/10Ex/main.c

@@ -0,0 +1,67 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include "array_io.h"
+#include "io_status.h"
+#include "solve.h"
+
+/* ./a.out n m p k [filename] */
+int main(int argc, char *argv[])
+{
+	double t, res, *a;
+	int n, m, p, k, task = 10;
+	char *name = 0;
+	
+	if (!((argc == 5 || argc == 6) && 
+				sscanf(argv[1], "%d", &n) == 1 && 
+				sscanf(argv[2], "%d", &m) == 1 && 
+				sscanf(argv[3], "%d", &p) == 1 &&
+				sscanf(argv[4], "%d", &k) == 1 &&
+				k >= 0 && k <= 4 && (!(k == 0 && argc != 6))))
+	{
+		printf("Usage: %s n m p k [filename]\n", argv[0]);
+		return 1;
+	}
+	if (argc == 6) name = argv[5];
+	
+	a = (double *)malloc(n * m * sizeof(double));
+	if (!a)
+	{
+		printf("Not enough memory\n");
+		return 2;
+	}
+
+	if (name)
+	{ /* из файла */
+		io_status ret;
+		ret = read_matrix(a, n, m, name);
+		do {
+			switch (ret)
+			{
+				case SUCCESS:
+					continue;
+				case ERROR_OPEN:
+					printf("Cannot open %s\n", name);
+					break;
+				case ERROR_READ:
+					printf("Cannot read %s\n", name);
+			}
+			free(a);
+			return 3;
+		} while (0);
+	} else init_matrix(a, n, m, k);
+
+	printf("Matrix:\n");
+	print_matrix(a, n, m, p);
+
+	t = clock();
+	res = t10_solve(a, n, m);
+	t = (clock() - t) / CLOCKS_PER_SEC;
+
+	printf("New matrix:\n");
+	print_matrix(a, n, m, p);
+	printf ("%s : Task = %d Result = %e Elapsed = %.2f\n", argv[0], task, res, t);
+	
+	free(a);
+	return 0;
+}

2025.03.14/10Ex/solve.c

@@ -0,0 +1,32 @@
+#include "solve.h"
+#include <math.h>
+
+#define eps 1e-9
+
+int compare(const double a, const double b)
+{
+	if (a - b > eps) return 1;
+	else if (b - a > eps) return -1;
+	return 0;
+}
+
+double t10_solve(double *a, int n, int m)
+{
+	int i, j;
+	double cur = 0, maximum = 0;
+	for (i = 0; i < n; i++)
+		for (j = 0; j < m; j++)
+			if (i == 0 || i == n-1 || j == 0 || j == m-1)
+				if (compare(fabs(a[i*m + j]), maximum) == 1)
+					maximum = fabs(a[i*m + j]);
+	
+	for (i = n-2; i > 0; i--)
+		for (j = 1; j < m-1; j++)
+		{
+			cur = (a[(i+1)*m + j] + a[(i-1)*m + j] + a[i*m + (j-1)] + a[i*m + (j+1)]) / 5;
+			if (compare(fabs(cur), maximum) == 1) maximum = fabs(cur);
+			a[i*m + j] = cur;
+		}
+
+	return maximum;
+}

2025.03.14/10Ex/solve.h

@@ -0,0 +1,7 @@
+#ifndef SOLVE_H
+#define SOLVE_H
+
+int compare(const double a, const double b);
+double t10_solve(double *a, int n, int m);
+
+#endif

2025.03.14/11Ex/a.txt

@@ -0,0 +1,3 @@
+1 1 1 1
+1 2 3 4
+2 2 2 2

2025.03.14/11Ex/array_io.c

@@ -0,0 +1,40 @@
+#include <stdio.h>
+#include "array_io.h"
+
+io_status read_matrix(double *a, int n, int m, const char *name)
+{
+	int i, j;
+	FILE *fp;
+	if (!(fp = fopen(name, "r"))) return ERROR_OPEN;
+	for (i = 0; i < n; i++)
+		for (j = 0; j < m; j++)
+			if (fscanf(fp, "%lf", a + i * m + j) != 1) 
+				{fclose(fp); return ERROR_READ;}
+	fclose(fp);
+	return SUCCESS;
+}
+
+void print_matrix(const double *a, int n, int m, int p)
+{
+	int np = (n > p ? p : n);
+	int mp = (m > p ? p : m);
+	int i, j;
+
+	for (i = 0; i < np; i++)
+	{
+		for (j = 0; j < mp; j++)
+			printf(" %10.3e", a[i * m + j]);
+		printf("\n");
+	}
+}
+
+void init_matrix(double *a, int n, int m, int k)
+{
+	double (*q)(int, int, int, int);
+	double (*f[])(int, int, int, int) = {f1, f2, f3, f4};
+	int i, j;
+	q = f[k-1];
+	for (i = 0; i < n; i++)
+		for (j = 0; j < m; j++)
+			a[i * m + j] = q(n, m, i+1, j+1);
+}

2025.03.14/11Ex/array_io.h

@@ -0,0 +1,11 @@
+#ifndef ARRAY_IO_H
+#define ARRAY_IO_H
+
+#include "io_status.h"
+#include "init_f.h"
+
+io_status read_matrix(double *a, int n, int m, const char *name);
+void print_matrix(const double *a, int n, int m, int p);
+void init_matrix(double *a, int n, int m, int k);
+
+#endif

2025.03.14/11Ex/init_f.c

@@ -0,0 +1,30 @@
+#include "init_f.h"
+#include <stdlib.h>
+
+#define MAX(n, m) (n < m ? m : n)
+
+double f1(int n, int m, int i, int j)
+{
+	return MAX(n, m) - MAX(i, j) + 1;
+}
+
+double f2(int n, int m, int i, int j)
+{
+	(void)n;
+	(void)m;
+	return MAX(i, j);
+}
+
+double f3(int n, int m, int i, int j)
+{
+	(void)n;
+	(void)m;
+	return abs(i - j);
+}
+
+double f4(int n, int m, int i, int j)
+{
+	(void)n;
+	(void)m;
+	return 1./(i+j-1);
+}