3

include<stdio.h>

#include<conio.h>

int add (int, int);
int com(int);
void main() 
{
    int i, j, dl, dil;
    int data1[10], data2[10], newdata[10], comp[10], checksum[10];
printf("\n Enter the data length=");
scanf("%d", &dl);
printf("\n Enter the data1 : \n");
    for (i = 0; i< dl; i++)
scanf("%d", &data1[i]);
printf("\n Enter the data2 : \n");
    for (i = 0; i< dl; i++)
scanf("%d", &data2[i]);
    for (i = dl - 1; i>= 0; i--) {
newdata[i] = add(data1[i], data2[i]);
    }
 
printf("\n\n Data 1        : ");
    for (i = 0; i< dl; i++)
printf("%d", data1[i]);
printf("\n Data 2        : ");
    for (i = 0; i< dl; i++)
printf("%d", data2[i]);
 
printf("\n\n The new data is : ");
    for (i = 0; i< dl; i++) {
printf("%d", newdata[i]);
    }
    printf("\n Checksum : ");

    for (i = 0; i< dl; i++) {

        checksum[i] = com(newdata[i]);
printf("%d", checksum[i]);
    }
 
printf("\n\n Receiver Side : \n");
printf("\n Data : ");
    for (i = 0; i< dl; i++)
printf("%d", data1[i]);
printf(" ");
    for (i = 0; i< dl; i++)
printf("%d", data2[i]);
printf(" ");
    for (i = 0; i< dl; i++)
printf("%d", checksum[i]);
 
printf("\n Addition : ");
    for (i = dl - 1; i>= 0; i--) {
newdata[i] = add(newdata[i], checksum[i]);
    }
    for (i = 0; i< dl; i++) {
printf("%d", newdata[i]);
    }
printf("\n  Compliment : ");
    for (i = 0; i< dl; i++) {
        comp[i] = com(newdata[i]);
printf("%d", comp[i]);
    }
}
 
int add(int x, int y) {
    static int carry = 0;
    if (x == 1 && y == 1 && carry == 0) {
        carry = 1;
        return 0;
    } else if (x == 1 && y == 1 && carry == 1) {
        carry = 1;
        return 1;
    } else if (x == 1 && y == 0 && carry == 0) {
        carry = 0;
        return 1;
    } else if (x == 1 && y == 0 && carry == 1) {

        carry = 1;

        return 0;
    } else if (x == 0 && y == 1 && carry == 0) {
        carry = 0;
        return 1;
    } else if (x == 0 && y == 1 && carry == 1) {
        carry = 1;
        return 0;
} else if (x == 0 && y == 0 && carry == 0) {
        carry = 0;
        return 0;
    } else {
        carry = 0;
        return 1;
    }
}
int com(int a) {
    if (a == 0)
        return 1;
    else
        return 0;
}

OUTPUT:



Sender Site:
10101001        subunit 1  
00111001        subunit 2        
11100010        sum (using 1s complement)       
00011101        checksum (complement of sum)

Data transmitted to Receiver is: 
10101001        subunit 1  

00111001        subunit 2     

00011101        checksum 
11111111            sum
00000000     sum's complement

Result is zero, it means no error.