[Dev-C++] reversing bit to be displayed

[Mitchell, T. (HNA) <Tam...@hj...>]

I am attempting to write a program that reverses the order of the bits in an
unsigned integer value.  The program should input the value from the user
and call function reverseBits to print the bits in reverse order.  Print the
value both before and after the bits are reversed.

Any suggestions?

#include <stdio.h>
#include <stdlib.h>

void reverseBits(unsigned);
void displayBits(unsigned);

int main()
{
  
    unsigned number;
    //  number = 21845;

    printf("enter a numnber  \n");
    scanf("%u", &number);
    
    printf("\n The reverse of \n");
    displayBits(number);
    printf("is\n");
    reverseBits(number);
    
    // reverseBits(~number);

      system("PAUSE");
      return 0;
}
void displayBits(unsigned value)
{
  unsigned c, displayMask = 1 << 15;
   
 printf("%7u = ", value);

 for (c=1; c <=16; c++)
     {
     putchar(value & displayMask ? '1' : '0');
    
     value <<= 1;
     

     if(c % 8 == 0)
          putchar(' ');
     }
      putchar('\n');
 }

void reverseBits(unsigned value)
{
  unsigned c, displayMask = 1 << 15;
    unsigned newval = 0;
  
for (c=1; c<=16; c++)
{
  newval += (value & displayMask ? '1' : '0');    

  value <<= 1;
  newval >>= 1;
  
  if (c%8 == 0)
    putchar(' ');
}
 putchar('\n');
 displayBits(newval);
 
}

Tamra Y. Mitchell
Heinz North America
Operating Systems  Analyst
(412) 237-5232  Work
(412) 996-9078  Cell Phone