#include <stdio.h>

int main() {
    // initialize variables
    int data[8], i, parity;

    // read input from user
    printf("Enter 8 bits of data: ");
    for(i=0; i<8; i++) {
        scanf("%d", &data[i]);
    }

    // calculate parity bit
    parity = 0;
    for(i=0; i<8; i++) {
        parity ^= data[i];
    }

    // add parity bit to data
    data[8] = parity;

    // print transmitted data
    printf("Transmitted data with parity bit: ");
    for(i=0; i<9; i++) {
        printf("%d", data[i]);
    }
    printf("\n");

    // receive data with parity bit
    printf("Enter received data with parity bit: ");
    for(i=0; i<9; i++) {
        scanf("%d", &data[i]);
    }

    // calculate parity bit of received data
    parity = 0;
    for(i=0; i<9; i++) {
        parity ^= data[i];
    }

    if(parity == 0) {
        printf("No error detected.\n");
    } else {
        printf("Error detected.\n");
    }

    return 0;
}