#include <stdio.h>     /* Calcul de l'operation binaire a ET b en     */
                       /* calculant les representations de a et de b  */

void printBinary(int bits[8])            /* Affiche une valeur binaire bits */
{
 int i,nb_Bits=8;
 for(i=0;i<=nb_Bits-1;i=i+1)
 {
  printf("%d",bits[i]);
 }
}

void convBinary(int v,int bits[8])      /* Calcul en binaire de v dans bits */
{
 int i,nb_Bits=8;
 int number,remaining;
 number=v;
 for(i=nb_Bits-1;i>=0;i=i-1)
 {
  remaining=number%2;
     number=number/2;
    bits[i]=remaining;
 }
}

void andBinary(int v1Bits[8],int v2Bits[8],        /* Calcul Binaire de ET  */
               int v1Andv2Bits[8])
{
 int i,nb_Bits=8;
 for(i=0;i<=nb_Bits-1;i=i+1)
 {
  if (v1Bits[i]+v2Bits[i]==2)
  {
   v1Andv2Bits[i]=1;
  }
  else
  {
   v1Andv2Bits[i]=0;
  }
 }
}

int convDecimal(int bits[8])                   /* Calcul en decimal de bits */
{
 int i,nb_Bits=8;
 int m,number;
 number=0;
 m=1;
 for(i=nb_Bits-1;i>=0;i=i-1)
 {
  number=number+(m*bits[i]);
  m=m*2;
 }

 return number;
}

int main(void)
{
 int a, b, number;
 int a_Bits[8], b_Bits[8], and_Bits[8];

 printf("Give me the values of a and b\n");
 printf("a? \n"); scanf("%d",&a);
 printf("b? \n"); scanf("%d",&b);

 convBinary(a,a_Bits);              /* Appel de fonction: calcul binaire de a */
 convBinary(b,b_Bits);              /* Appel de fonction: calcul binaire de b */

 andBinary(a_Bits,b_Bits,and_Bits); /* Appel de fonction:
                                       calcul binaire de a ET b               */

 number = convDecimal(and_Bits);    /* Appel de fonction:
                                       calcul decimal de a ET b               */


 printf("  a: ");
 printBinary(a_Bits);
 printf("\n");

 printf("  b: ");
 printBinary(b_Bits);
 printf("\n");

 printf("and: ");
 printBinary(and_Bits);
 printf("\n");

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

 return 0;
}