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.
