Multiplication.

#include<stdio.h>

#include<conio.h>

void main()

{

    int a[10],m[10],q[10],i,j,c=0,b[10];

    clrscr();

    printf("\n Enter the value of multiplicant(m) : ");

    for(i=4;i>=1;i--)

    {

       scanf("%d",&m[i]);

       a[i]=0;

     }

    printf("\n Enter the value of multiplier (q)  : ");

    for(i=4;i>=1;i--)

       scanf("%d",&q[i]);

    for(j=1;j<=4;j++)

    {

     if(q[1]==1)

     {

       for(i=1;i<=4;i++)

       {

            b[i]=((!m[i]&&!a[i]&&c)||(!m[i]&&a[i]&&!c)

                 ||(m[i]&&a[i]&&c)||(m[i]&&!a[i]&&!c));

            c=((m[i]&&a[i])||(a[i]&&c)||(m[i]&&c));

            a[i]=b[i];

            }

      }

     for(i=1;i<=3;i++)

       q[i]=q[i+1];

       q[4]=a[1];

     for(i=1;i<=3;i++)

       a[i]=a[i+1];

       a[4]=c;

       c=0;

   }

   printf("\n\n Solution for (m*q)  :  ");

   for(i=4;i>=1;i--)

      printf("%d",a[i]);

   for(i=4;i>=1;i--)

      printf("%d",q[i]);

   getch();

}

/* OUTPUT

 Enter the value of multiplicant(m) : 1 0 0 1

 Enter the value of multiplier (q)  : 0 1 0 0

 Solution for (m*q)  :  00100100

*/