diff32_031.c

#include <stdio.h>




void displayOptions(char *name){
  printf("\r\nUsage: %s word1 word2\r\n",name);
}


void printfb(unsigned int w){
  int i;

  for(i=31;i>-1;i--){ 
     if(w >= (1<<i)){
       printf("1  ");
       w -= 1<<i;
     }else{
      printf("0  ");
     } 
  }
}


void printd(unsigned int w1,unsigned int w2){
  int i;
  unsigned int diff = w1^w2;

//TODO: use printfb
  for(i=31;i>-1;i--){ 
     if(diff >= (1<<i)){
       printf("|  ");
       diff -= 1<<i;
     }else{
       printf("   ");
     } 
  }
}


void printbitnumber(){
  int i;

  for(i=0;i<32;i++){
    printf("%2d ",i);
  }
}


int main(int argc,char **argv)
{
  unsigned int w1,w2; 
 
   if(argc<3){
     displayOptions(argv[0]);
     return 0;
   }

  w1 = strtoul(argv[1],NULL,0);
  w2 = strtoul(argv[2],NULL,0);

  printf("\r\n                 ");
  printbitnumber(); 
  printf("\r\nword1 0x%08X  ",w1);
  printfb(w1);
  printf("\r\n");
  printf("                  ");
  printd(w1,w2);
  printf("\r\nword2 0x%08X  ",w2);
  printfb(w2);
  printf("\r\n");
  printf("                 ");
  printbitnumber();  
  printf("\r\n\r\n");

}