93. Reverse a String In-Place

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

void reverse_string(char *str) {
    // Your logic here
    if (str == NULL || str[0]=='\n') return; 
    int l = 0;
    int r = strlen(str) - 1;
    while(l <= r)
    {
        char temp = str[l];
        str[l] = str[r];
        str[r] = temp; 
        l++;
        r--;
    }
    return;
}

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;
}