Reverse a String In-Place

Code

#include <stdio.h>

void reverse_string(char *str) {
    // Your logic here
    int n = 0;
    while (str[n] != '\0') {
        n++;
    }
    int low = 0;
    int high = n-1;
    while (low <= high) {
        char temp = str[low];
        str[low] = str[high];
        str[high] = temp;
        low++;
        high--;
    }
}

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