Write a C program to find the 2’s complement of a binary number.

Write a C program to find the 2’s complement of a binary number.

Program Code:

#include<stdio.h>

void twoscomplement(int a[10],int);

void main()

{

int n,i,a[10];

printf("\n enter number of bits in the binary number: ");

scanf("%d",&n);

printf("\n enter the binary number into the array: ");

for(i=0;i<n;i++)

scanf("%d",&a[i]);

twoscomplement(a,n);

getch();

}

void twoscomplement(int a[10],int n)

{

int i,c=1;

for(i=0;i<n;i++)

{

if(a[i]==0)

a[i]=1;

else

a[i]=0;

}

printf("\n one's complement of the binary number is: ");

for(i=0;i<n;i++)

printf("%5d",a[i]);

for(i=n-1;i>=0;i--)

{

a[i]=a[i]+c;

if(a[i]==1)

{

c=0;

break;

}

else{

a[i]=a[i]-2;

c=1;

}

}

printf("\n 2's complement of the binary number is: ");

if(c==1)

printf("%5d",c);

for(i=0;i<n;i++)

printf("%5d",a[i]);

}