Replacing character in a string [duplicate]

Answer 1

You can use a different variable

#include <stdio.h>
#include <string.h>
int main(void)
{
    char s[20] = "aaabaa";
    char temp[20]="";
    int i, j,k;
    k=0;
    for (i=0; s[i]!= '\0'; i++)
    {
        if (s[i] == 'b')
        {
            for (j=0; j<5; j++)
            {
                temp[k] = 'c';
                k++;
            }
        }
        else
        {
            temp[k]=s[i];
            k++
        }
    }
    printf("%s\n", temp);
}