Please anyone can explain me this c++ program ?

Question

#include<iostream.h>
#include<conio.h>
void main()
{
clrscr();
int a,b;
a=5;
b&=a; //point of interest to know
cout<<b;
getch();
}

I want to know why and how its output arrives 4.

Answer 1

Porting it over to standard C++,

#include<iostream>

int main()
{
int a,b;
a = 5;
b &= a;

std::cout<<b;

return 0;
}

'&=' is the bitwise AND assignment operator. What it does, is to perform a bitwise AND operation and then assign the value to b.

Answer 2

Thanks 😀

Answer 3

it will print the contact of variable "b" on output window

Answer 4

https://www.sololearn.com/discuss/294730/?ref=app

Answer 5

How does these bitwise operators work?

Answer 6

explain sir..
std::cout<<b

Answer 7

std:: why written