Сделал 13 усовершенствованную с иным заданием

WorkingArrays/13ExDeluxe/equal.c

@@ -0,0 +1,23 @@
+#include "equal.h"
+
+int canFixArray(double * numbers) {
+    unsigned short indexNonEqualNumber = 0, indexSecondNonEqualNumber = 0, numberDiffernce = 0, length = (int)numbers[0];
+
+    for (int i = 2; i < length; ++i) {
+        if (!isEqual(numbers[i - 1], numbers[i])) {
+            numberDiffernce++;
+            if (!indexNonEqualNumber) indexNonEqualNumber = i;
+            else if (!indexSecondNonEqualNumber) indexSecondNonEqualNumber = i - 1;
+        }
+    }
+
+    if (numberDiffernce > 2) return -1;
+    else if (numberDiffernce == 2 && (!isEqual(numbers[indexNonEqualNumber - 1], numbers[length - 1]) || indexNonEqualNumber != indexSecondNonEqualNumber)) return -2;
+    else if (numberDiffernce == 1 && ((indexNonEqualNumber != 2) && (indexNonEqualNumber != (length - 1)))) return -3;
+
+    return 0;
+}
+
+bool isEqual(double first, double second) {
+    return (fabs(first - second) < eps);
+}

WorkingArrays/13ExDeluxe/equal.h

@@ -0,0 +1,13 @@
+#ifndef EQUAL
+#define EQUAL
+
+#include <stdio.h>
+#include <math.h>
+#include <stdbool.h>
+
+#define eps 1.e-6
+
+int canFixArray(double * numbers);
+bool isEqual(double first, double second);
+
+#endif // EQUAL

WorkingArrays/13ExDeluxe/input.txt

@@ -0,0 +1 @@
+1 1 1 2 2 2

WorkingArrays/13ExDeluxe/main.c

@@ -0,0 +1,19 @@
+#include <stdio.h>
+#include "tools.h"
+#include "equal.h"
+
+int main(void) {
+    double * numbers;
+    FILE * file = getFile();
+    if (file == NULL) return 1;
+
+    numbers = getList(file);
+    if (numbers == NULL) return 1;
+
+    if (canFixArray(numbers)) printf("It can't be fixed!");
+    else printf("It is possible to make them equal!");
+
+    free(numbers);
+
+    return 0;
+}

WorkingArrays/13ExDeluxe/makefile

@@ -0,0 +1,11 @@
+all: main.o equal.o tools.o
+	gcc main.o equal.o tools.o && del *.o
+	
+main.o: main.c
+	gcc -c main.c
+
+equal.o: equal.c
+	gcc -c equal.c
+
+tools.o: tools.c
+	gcc -c tools.c

WorkingArrays/13ExDeluxe/tools.c

@@ -0,0 +1,50 @@
+#include "tools.h"
+
+FILE * getFile(void)
+{
+    FILE * file;
+    char filename[50];
+
+    printf("Enter filename: ");
+    if (scanf("%s", filename) == 1)
+    {
+        file = fopen(filename, "r");
+        if (file == NULL) {
+            printf("Error file!\n");
+            return NULL;
+        } else {
+            return file;
+        }
+    } else
+    {
+        printf("Empty name!\n");
+        return NULL;
+    }
+}
+
+double * getList(FILE * file) {
+    double current;
+    int i, length = 2;
+    double * numbers = NULL;
+
+    if (fscanf(file, "%lf", &current) != 1) {
+        printf("File is empty!");
+        return numbers;
+    }
+
+    numbers = (double *)malloc(length * sizeof(double));
+    i = 1;
+
+    do {
+        if (i >= length) {
+            length *= 2;
+            numbers = (double *)realloc(numbers, (length * sizeof(double)));
+        }
+        numbers[i] = current;
+        i++;
+    } while (fscanf(file, "%lf", &current) == 1);
+
+    numbers = (double *)realloc(numbers, i * sizeof(double));
+    numbers[0] = i;
+    return numbers;
+}

WorkingArrays/13ExDeluxe/tools.h

@@ -0,0 +1,10 @@
+#ifndef TOOLS
+#define TOOLS
+
+#include <stdio.h>
+#include <stdlib.h>
+
+FILE * getFile(void);
+double * getList(FILE * file);
+
+#endif