CHAR_BIT in C

Difficulty Level : Medium
Last Updated : 28 Oct, 2017

CHAR_BIT : It is the number of bits in char. These days, almost all architectures use 8 bits per byte (But it is not the case always, some older machines used to have 7-bit byte). It can be found in

Let us see an application of it. Suppose we wish to print byte by byte representation of an integer.

Examples :

Input  : 4
Output : 00000000 00000000 00000000 00000100

Input  : 12
Output : 00000000 00000000 00000000 00001100

// CPP program to print byte by byte presentation 
#include <bits/stdc++.h> 
using namespace std; 
  
// function in which number and intitally 0 is passed 
void printInBinary(int num) 
{ 
    int n = CHAR_BIT*sizeof(num); 
    stack<bool> s; 
    for (int i=1; i<=n; i++) 
    { 
        s.push(num%2); 
        num = num/2;  
    }      
    for (int i=1; i<=n; i++) 
    { 
        cout << s.top(); 
        s.pop(); 
          
        // Put a space after every byte.  
        if (i % CHAR_BIT == 0) 
        cout << " ";  
    } 
} 
  
int main() 
{ 
    int num = 12; 
    printInBinary(num); 
    return 0; 
} 

Output :

00000000 00000000 00000000 00001100

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