Reverse a String In-Place

Code

#include <stdio.h>

void reverse_string(char *str) {
    // Your logic here
    int count=0,i=0,j=0;
    while(str[i++]) count++;
   // printf("%d",count);
    int k=count-1;
    while(j<k){
        char ch = str[j];
        str[j] = str[k];
        str[k] = ch;
        j++;k--;
    }
   // printf("%s",str);
}

int main() {
    char str[101];
    fgets(str, sizeof(str), stdin);

    // Remove newline
    int i = 0;
    while (str[i] != '\0') {
        if (str[i] == '\n') {
            str[i] = '\0';
            break;
        }
        i++;
    }

    reverse_string(str);
    printf("%s", str);
    return 0;
}

Solving Approach