#include <math.h>
#include <stdio.h>
#include <stdlib.h>
 
const long double PI = acos(-1);
const long int iters = 200;
 
double func(double x)
{
    return (sin(x) + 1 - log(x));
}
 
double rad2ang(double rad)
{
    return 180*rad/PI;
}
 
double find(double x0, double x1, double eps)
{
    double left = x0, right = x1, x, f;
    int iter = 0;
    printf("x0 = %lf x1 = %lf ", x0, x1);
    do {
        x = (left + right) / 2;
        f = func(x);
        if (f < 0)
            right = x;
        else
            left = x;
        iter++;
    } while (fabs(f) > eps && iter < iters);
    printf("%d итераций\n", iter);
    return x;
}
 
int main()
{
    const long double eps = 1e-5;
    system("chcp 1251");
    system("cls");
    printf("%lf ", rad2ang(find(eps, 100.0, eps)));
    getchar();
    return 0;
}
 

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