Reverse a String In-Place

Code

#include <stdio.h>
#include <string.h>
void reverse_string(char *str,char len) {
    // Your logic here
    for(int i=0;i<(len/2);i++){
        char tail = str[i];
        str[i]=str[len-1-i];
        str[len-1-i]=tail;

    }
}

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++;
    }
    char len;
    len=strlen(str);

    reverse_string(str,len);
    printf("%s", str);
    return 0;
}

Solving Approach