строки_1

#include <string.h>
#include <stdio.h>

int main(void)
{
    char buf[] = "FjsdhjhfjjhhDvdnnfbcbFbkfhdjchD";
    char s[strlen(buf)];
    char temp;
    int f_idx, d_idx;
    int d_flag = 0;
    strcpy(s, buf);
    printf("IN string:  %s\n", s);
    for (int i = 0; i < strlen(s); i++)
    {
        if (s[i] == 'd' && d_flag == 0)
        {
            d_idx = i;
            d_flag = 1;
        }
        if (s[i] == 'f')
        {
            f_idx = i;
        }
    }
    printf("%n %n\n", f_idx, d_idx);
    temp = s[f_idx];
    s[f_idx] = s[d_idx];
    s[d_idx] = temp;
    printf("OUT string: %s\n", s);
    return 0;
}