Reverse a String In-Place

Code

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

void reverse_string(char *str) {
    // Your logic here
    char str1[101];
    int len = strlen(str), j = 0;
    for(int i = len-1; i >=0; i--){
        str1[j] = str[i];
        j++;
    }
    str1[j] = '\0';
    j=0;
    while(str1[j] != 0){
        str[j] = str1[j];
        j++;
    }
}

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