Reverse a String In-Place

Code

#include <stdio.h>

void swap(char *str, int i, int j)
{
    int temp = str[i];
    str[i] = str[j];
    str[j] = temp;
}

void reverse_string(char *str) {
    // Your logic here
    int end = 0;
    while(str[end] != '\0')
    {
        end++;
    }

    int i = 0;
    int j = end-1;

    while(i < j)
    {
        swap(str, i++, j--);
    }

}

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