93. Reverse a String In-Place

#include <stdio.h>

int find_length(char *str){
    int count = 0;
    while(*str++ != '\0'){
        count++;
    }
    return count;
}

void swap(char* left, char* right){
    char temp = *left;
    *left = *right;
    *right = temp;
}

void reverse_string(char *str) {
    int n = find_length(str);
    char* left = (str);
    char* right = (str + n - 1);
    while(left < right){
        swap(left,right);
        left++;
        right--;
    }
}

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;
}