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AZEN-SGG 2025-05-01 09:16:08 +03:00
parent 22ef2dda9b
commit c4cd60525e
8 changed files with 282 additions and 0 deletions
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2025.05.02/08Ex/solve.c Normal file
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#include "solve.h"
#include "status.h"
#include <math.h>
#include <float.h>
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;
}