knr/2.8.c

#include <stdio.h>
unsigned getbits(unsigned x, int p, int n);
unsigned int setbits(unsigned int x,unsigned int p,unsigned int n,unsigned int y);
#define MAGIC_NUMBER 33091
void shotgunPrintUint(const char name[], unsigned int in);
unsigned int invertBits(unsigned int x,unsigned int p,unsigned int n);
unsigned getInvertBits(unsigned x, int p, int n);
int rightrot(int in, int rots);

int main()
{
  
  shotgunPrintUint("return   ",rightrot(0xdeadbeef,8));
  //  printf("i:%u \t temp:%x \n",-1,temp);

  /** shifting 32 bits out is an overflow condition .*/
  //  unsigned int temp = ~0;
  // unsigned int temp2=temp<<32;
  // printf("\t temp:%x \n",temp2);
  return(0);
}

int rightrot(int in, int rots)
{
  return in >> rots;
}



/** 
caution if you printf, padded with 0's, a hex number of exactly 0 it will print
as 0000000000 not 0x00000000
*/
/**
   drop me in if you don't want to use a debugger like GDB to shotgun-debug
   print the value of a uint
 */
void shotgunPrintUint(const char name[], unsigned int in)
{
  printf(name,23423);
  printf("\t\t: %0#10x \n",in);
  return;
}