Reverse a String In-Place

Code

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

void reverse_string(char *str) {
    int i=0,n;
    char str1;
    n=strlen(str);
    while ((str[i]!='\0')&&(i<(n-i))){
     str1=str[n-1-i];
     str[n-1-i]=str[i];
     str[i]=str1;
     i++;
    }
}

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