Reverse a String In-Place

Code

#include <stdio.h>

void reverse_string(char *str) {
    // Your logic here
    int len;
    int i,j;
    char t;

    for(len=0;str[len];len++);
    for(i=0,j=len-1;i<j;i++,j--)
    {
        t=str[i];
        str[i]=str[j];
        str[j]=t;
    }
}

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