Question

How to get the size in bytes of a member of a struct in C++

Answer 1

#include <iostream>

struct employee
{
    int id;
    char name[32];
};

int main() {
    std::cout << sizeof(employee::id) << "\n";
    std::cout << sizeof(employee::name) << "\n";
}


 
/*
run:
 
4
32
 
*/

 

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Answer 2

#include <iostream>

struct employee
{
    int id;
    char name[32];
};

int main() {
    employee e;
    
    size_t size_in_byte = sizeof(employee::id);
    std::cout << size_in_byte << "\n";
    
    size_in_byte = sizeof(employee::name);
    std::cout << size_in_byte << "\n";
}


 
/*
run:
 
4
32
 
*/

 

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