"Thinkinginc++" 13, operation of output shift operator

Header file

/*** function: Output shift operator Operation * Time: August 12, 2014 20:01:32* Author: cutter_point*/#ifndef printbinary_h_included#define Printbinary_h_  Included#include<iostream>using namespace Std;void printbinary (const unsigned char val) {for    (int i=7; I! =-1; -i)    {        if (Val & (1<<i))    //bitwise operator, with            cout<< "1";  Bar 1 Left I bit, if and Val is matched then the output 1, otherwise is 0        else        //is a total of 8 bits a byte            cout<< "0";    } #endif//printbinary_h_included

CPP file

/*** function: Output shift operator Operation * Time: August 12, 2014 20:01:43* Author: cutter_point*/#include "printBinary.h" #include <iostream># include<stdlib.h>using namespace std; #define PR (STR, EXPR) cout<<str; Printbinary (EXPR);    Cout<<endl;int Main () {unsigned int getval;    unsigned char a, b;    cout<< "Enter a number from 0 to 255:"; Since char is a byte length of 8 bits, it is 0 to 255 cin>>getval;    A=getval;    PR ("A In binary:", a);    cout<< "Enter a number from 0 to 255:"; cin>>getval;    B=getval;    PR ("B in binary:", b);    cout<< "----------------------------------------------------------------------------" <<endl;    PR ("A & B:", a&b); PR ("a |    B: ", a|b);    PR ("a ^ B:", a^b);    PR ("~a", ~a);    PR ("~b", ~b);    cout<< "----------------------------------------------------------------------------" <<endl;    unsigned char c=0x5a;    PR ("C in binary:", c);    a&=c; PR ("a&=c;    A= ", a);    A|=c; PR ("A|=C;    A= ", a);    A^=c; PR ("A^=C;    A= ", a);    a&=b; PR ("A&=b;    A= ", a);    A|=b; PR ("A|=B;    A= ", a);    A^=b; PR ("A^=B;    A= ", a);    b&=c; PR ("b&=c;    B= ", b);    B|=c; PR ("B|=C;    B= ", b);    B^=c; PR ("B^=C;    B= ", b);    System ("pause"); return 0;}