#include <stdio.h>

/* Calcul de l'operation binaire a ET b en
   calculant les representations de a et de b
*/

int main(void)
{
 int a,b,m;
 int i,nb_Bits=8;
 int a_Bits[8], b_Bits[8], and_Bits[8];
 int number,remaining;

 printf("Donnez moi les valeurs de a et b\n");
 printf("a? \n"); scanf("%d",&a);
 printf("b? \n"); scanf("%d",&b);

 /* Calcul de a en binaire */

 number=a; 
 for(i=nb_Bits-1;i>=0;i=i-1)
 {
  remaining=number%2;
     number=number/2;
  a_Bits[i]=remaining;
 }

 /* Calcul de b en binaire */

 number=b;  
 for(i=nb_Bits-1;i>=0;i=i-1)
 {
  remaining=number%2;
     number=number/2;
  b_Bits[i]=remaining;
 }

 /* Calcul de a ET b en binaire */

 for(i=0;i<=nb_Bits-1;i=i+1)
 {
  if (a_Bits[i]+b_Bits[i]==2) { and_Bits[i]=1; }
  else { and_Bits[i]=0; }
 }

 /* Calcul en decimal de a ET b */

 number=0; m=1;
 for(i=nb_Bits-1;i>=0;i=i-1)
 {
  number=number+(m*and_Bits[i]);
  m=m*2;
 }

 printf("  a: ");
 for(i=0;i<=nb_Bits-1;i=i+1)
 {
  printf("%d",a_Bits[i]);
 }
 printf("\n");

 printf("  b: ");
 for(i=0;i<=nb_Bits-1;i=i+1)
 {
  printf("%d",b_Bits[i]);
 }
 printf("\n");

 printf("and: ");
 for(i=0;i<=nb_Bits-1;i=i+1)
 {
  printf("%d",and_Bits[i]);
 }
 printf("\n");

 
 printf("a ET b: %d\n",number);

 return 0;
}