diff --git a/2025.05.02/08Ex/Makefile b/2025.05.02/08Ex/Makefile new file mode 100644 index 0000000..0438df0 --- /dev/null +++ b/2025.05.02/08Ex/Makefile @@ -0,0 +1,42 @@ +WFLAGS = -fstack-protector-all -W -Wall -Wextra -Wunused \ +-Wempty-body -Wlogical-op -Wold-style-declaration -Wmissing-parameter-type \ +-Wignored-qualifiers -Winit-self -Wshadow -Wtype-limits \ +-Wpointer-arith -Wformat-security -Wmissing-format-attribute -Wformat=1 \ +-Wdeclaration-after-statement -Wbad-function-cast -Wnested-externs \ +-Wmissing-prototypes -Wmissing-declarations -Wold-style-definition \ +-Wcast-align -Werror -pedantic -pedantic-errors -Wfloat-equal \ +-Wwrite-strings -Wno-long-long -std=gnu99 -Wstrict-prototypes \ +-Wmissing-field-initializers -Wpointer-sign + +LDFLAGS = -std=gnu99 -mfpmath=sse -O3 +LDLIBS = -lm + +ifeq ($(OS),Windows_NT) + EXE = exe + CLEAN = del + LDLIBS += -lssp +else + EXE = out + CLEAN = rm -f +endif + +TARGET = a08.$(EXE) +OBJ = main.o solve.o init_f.o + +%.o: %.c + gcc $(WFLAGS) $(LDFLAGS) -c $< -o $@ + +$(TARGET): $(OBJ) + gcc $^ -o $@ $(LDLIBS) + +# Отладочная сборка (gdb) +gdb: LDFLAGS = -std=gnu99 -mfpmath=sse -g -O0 +gdb: clean $(TARGET) + +# Профилировочная сборка (gprof) +prof: LDFLAGS += -pg +prof: LDLIBS += -pg +prof: clean $(TARGET) + +clean: + $(CLEAN) *.o *$(EXE) diff --git a/2025.05.02/08Ex/init_f.c b/2025.05.02/08Ex/init_f.c new file mode 100644 index 0000000..22eb5ea --- /dev/null +++ b/2025.05.02/08Ex/init_f.c @@ -0,0 +1,61 @@ +#include "init_f.h" + +#include + + +static int cl = 0; + +int get_call_count (void) +{ + return cl; +} + +double f0 (double x) +{ + cl++; + (void)x; + + return 1; +} + +double f1 (double x) +{ + cl++; + return (x * 1e-100) - 1.0; +} + +double f2 (double x) +{ + cl++; + return 4 - x * x; +} + +double f3 (double x) +{ + double x_2 = x * x; + cl++; + + return x * x_2 + 3 * x_2 + 16; +} + +double f4 (double x) +{ + double x_2 = x * x; + cl++; + + return 3 - 2 * x_2 - x_2 * x_2; +} + +double f5 (double x) +{ + cl++; + return sqrt(fabs(x) + 1) - 2; +} + +double f6 (double x) +{ + cl++; + return sqrt(sqrt(fabs(x) + 1) + 1) - 2; +} + + diff --git a/2025.05.02/08Ex/init_f.h b/2025.05.02/08Ex/init_f.h new file mode 100644 index 0000000..ee5e8e8 --- /dev/null +++ b/2025.05.02/08Ex/init_f.h @@ -0,0 +1,13 @@ +#ifndef INIT_F_H +#define INIT_F_H + +int get_call_count (void); +double f0 (double x); +double f1 (double x); +double f2 (double x); +double f3 (double x); +double f4 (double x); +double f5 (double x); +double f6 (double x); + +#endif diff --git a/2025.05.02/08Ex/io_status.h b/2025.05.02/08Ex/io_status.h new file mode 100644 index 0000000..8867bee --- /dev/null +++ b/2025.05.02/08Ex/io_status.h @@ -0,0 +1,16 @@ +#ifndef IO_STATUS_H +#define IO_STATUS_H + +#define ERR_MEM "Error: Not enough memory!" +#define ERR_OPEN "Error: Cannot open file" +#define ERR_READ "Error: Cannot read file" +#define ERR_FUNC "Error: Algorithm is not applicable!" + +typedef enum _io_status +{ + SUCCESS, + ERROR_OPEN, + ERROR_READ +} io_status; + +#endif diff --git a/2025.05.02/08Ex/main.c b/2025.05.02/08Ex/main.c new file mode 100644 index 0000000..8904670 --- /dev/null +++ b/2025.05.02/08Ex/main.c @@ -0,0 +1,64 @@ +#include +#include +#include + +#include "init_f.h" +#include "status.h" +#include "solve.h" + +/* ./a.out a b eps M k */ +int main(int argc, char *argv[]) +{ + double t, a, b, eps, x = 0; + int m, k, cl, it = 0, task = 8; + status ret; + + double (*f) (double); + double (*f_lst[]) (double) = {f0, f1, f2, f3, f4, f5, f6, sin}; // TODO: Remove sin + int len_f = sizeof(f_lst) / sizeof(f_lst[0]); + + if ( + !((argc == 6) && + sscanf(argv[1], "%lf", &a) == 1 && + sscanf(argv[2], "%lf", &b) == 1 && + (a <= b) && + (sscanf(argv[3], "%lf", &eps) == 1 && (eps >= 0)) && + ((sscanf(argv[4], "%d", &m) == 1) && m > 0) && + ((sscanf(argv[5], "%d", &k) == 1) && ((0 <= k) && (k <= len_f)))) + ) { + fprintf(stderr, "Usage: %s a b eps M k\n", argv[0]); + return 1; + } + + f = f_lst[k]; + + t = clock(); + ret = t8_solve(f, a, b, eps, m, &x, &it); + t = (clock() - t) / CLOCKS_PER_SEC; + + cl = get_call_count(); + +// printf("x = %e\tf(x) = %e\n", x, f(x)); + + do { + switch (ret) + { + case SUCCESS: + continue; + case RUN_TIME: + fprintf(stderr, "Error: with code %d - Not enough iterations!\n", ret); + break; + case EQUAL: + fprintf(stderr, "Error: with code %d - The dots degenerated into one!\n", ret); + break; + } + + fprintf(stdout, "%s : Task = %d NOT FOUND Count = %d T = %.2f\n", argv[0], task, cl, t); + return ret; + } while (0); + + printf("%s : Task = %d X = %e Res = %e Its = %d Count = %d T = %.2f\n", argv[0], task, x, f(x), it, cl, t); + + return 0; +} + diff --git a/2025.05.02/08Ex/solve.c b/2025.05.02/08Ex/solve.c new file mode 100644 index 0000000..113047b --- /dev/null +++ b/2025.05.02/08Ex/solve.c @@ -0,0 +1,64 @@ +#include "solve.h" +#include "status.h" + +#include +#include + + +int t8_solve ( + double (*f) (double), + double a, double b, + double eps, int m, double *x +) { + int it = 0; + status ret = SUCCESS; + double c = DBL_MAX, y, y_a = f(a), y_b = f(b); + + if (fabs(y_a) - eps < DBL_EPSILON) + { + *x = a; + return SUCCESS; + } if (fabs(y_b) - eps < DBL_EPSILON) + { + *x = b; + return SUCCESS; + } if (fabs(fabs(y_b) - fabs(y_a)) < DBL_EPSILON) + { + *x = a; + return EQUAL; + } + + for (it = 0; it < m; ++it) + { + double h = (b - a) * 0.1; + c = a + h; + y = f(c); + + if (fabs(y) - eps < DBL_EPSILON) + { + ret = SUCCESS; + break; + } else if (fabs(y_a) - fabs(y_b) > DBL_EPSILON) + { + a = c; + y_a = y; + } else if (fabs(y_b) - fabs(y_a) > DBL_EPSILON) + { + b = c; + y_b = y; + } else + { + ret = EQUAL; + break; + } + } + + if (it >= m) + ret = RUN_TIME; + + *x = c; + *m_it = it; + + return ret; +} + diff --git a/2025.05.02/08Ex/solve.h b/2025.05.02/08Ex/solve.h new file mode 100644 index 0000000..e27e04f --- /dev/null +++ b/2025.05.02/08Ex/solve.h @@ -0,0 +1,12 @@ +#ifndef SOLVE_H +#define SOLVE_H + +#include "status.h" + +status t8_solve ( + double (*f) (double), + double a, double b, + double eps, int m, double *x, int *m_it + ); + +#endif diff --git a/2025.05.02/08Ex/status.h b/2025.05.02/08Ex/status.h new file mode 100644 index 0000000..b2a4d5e --- /dev/null +++ b/2025.05.02/08Ex/status.h @@ -0,0 +1,10 @@ +#ifndef STATUS_H +#define STATUS_H + +typedef enum _status { + SUCCESS, + RUN_TIME, + EQUAL, +} status; + +#endif