Reverse a String In-Place

Code

#include <stdio.h>

void reverse_string(char *str) {
    // Your logic here

    char *end = str; 
    while(*end != '\0'){
        ++end; 

    }
    --end; 
    char temp; 
    while (str < end){
        temp = *str; 
        *str = *end; 
        *end = temp; 
        --end; 
        ++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