Reverse a String In-Place

Code

#include <stdio.h>

void reverse_string(char *str, int n) {
    // Your logic here
    int idx=0;
    int time = n/2;
    while(time--){
        char tmp = *(str+idx);
        *(str+idx) = *(str+n-1-idx);
        *(str+n-1-idx) = tmp;
        idx++;
    }
    
}

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

Solving Approach