Question

The following code is working fine in C but when I try to write it in c++ then the program does not work.Please explain.

C code :

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

int main()
{
    int a = 33,b = 7;
    printf("%d\n",a&b);
    return 0;
}

C++ code:

#include<iostream>

using namespace std;

int main()
{
    int a = 33,b = 7;
    cout << 33&7 << endl;
    return 0;
}

Answer 1

Watch your operator precedence:

cout << (33 & 7) << endl;

& has lower precedence than <<. So you need to use ().

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For the full list of operator precedence in C and C++:

http://en.wikipedia.org/wiki/Operators_in_C_and_C%2B%2B#Operator_precedence