93. Reverse a String In-Place

#include <stdio.h>

void reverse_string(char *str) {
    // Your logic here
    int length = 0;
    while (*(str+length)!='\0')
        length+=1;
    for(int i=0;i<length/2;i++){
        *(str+i) = *(str+i) + (*(str+length-i-1));
        *(str+length-i-1) = *(str+i) - (*(str+length-i-1));
        *(str+i) = *(str+i) - (*(str+length-i-1));
    }
}

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;
}