Something

#include <iostream>
using namespace std;

// Function prototype
void printBinary(const unsigned char val);

// We will use a preprocessor MACRO to save typing
// This macro will print the specified string, followed by the
//  binary representation of an expression and then a newline.
// The '\' simply means to continue to the nest line
#define PR(STR, EXPR) cout << STR; printBinary(EXPR); cout << endl;  

int main() {
	// Make all the variables unsigned, as you do not want signs
	//  when dealing with bits.
  	unsigned int getval;
  	unsigned char a, b;
  	
	cout << "Enter a number between 0 and 255: ";
  	cin >> getval; 
	a = getval;	// convert the int to it's ASCII value
  	PR("a in binary: ", a);
 	
	cout << "Enter a number between 0 and 255: ";
  	cin >> getval; b = getval;
  	PR("b in binary: ", b);
  	PR("a | b = ", a | b);
  	PR("a & b = ", a & b);
  	PR("a ^ b = ", a ^ b);
  	PR("~a = ", ~a);
  	PR("~b = ", ~b);
  
	// An interesting bit pattern:
  	unsigned char c = 0x5A; 
  	PR("c in binary: ", c);
  	a |= c;
  	PR("a |= c; a = ", a);
  	b &= c;
  	PR("b &= c; b = ", b);
  	b ^= a;
  	PR("b ^= a; b = ", b);
} ///:~

// This function takes as single byte and displays it bit-by-bit
void printBinary(const unsigned char val) {
  	for(int i = 7; i >= 0; i--)
    if(val & (1 << i)) 
    	cout << "1";
    else
      	cout << "0";
} ///:~