Reverse a String In-Place

Code

#include <stdio.h>

void reverse_string(char *str) {
    // Your logic here
    int one=0;
    int end=0;
    while (str[end] != '\0') end++; // find real length
    end--;
    char stt;
    while(one<=end){
        stt=str[one];
        str[one]=str[end];
        str[end]=stt;
        one++;
        end--;
    }
    
}

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