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BARC 2026 CS | Memory Based Questions | GO Classes | Question: 3

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2 2 votes

Size of $\verb|int|$ is $\mathrm{2~B}$ and size of $\verb|float|$ is $\mathrm{4~B}$

Consider the following C++ program:

#include<iostream>

using namespace std;

int main()
{
    int a = 4;
    float b = 3;
    
    cout << sizeof(++a + b) << " ";
    cout << a;
    
    return 0;
}

What will be the output produced by the above program?

  1. $4~5$
     
  2. $4~4$
     
  3. $6~5$
     
  4. $4~6$

1 Answer

0 0 votes

Key concept : 

1. sizeof does not evaluate  the expression  inside it .

2. It only check  the type of expression  at comile time.

3. so ++a  is not executed 

step 1  ++a  + b  

a = int 

b  = float 

int + float = float ;

sizeof(float) = 4 

++a. is not executed so value of a remain same . 

so final ouptuput =  4 4 

so option B is correct. 

 

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