Question

How to get the number of bytes of a variable in C++

Answer 1

#include <iostream>

int main()
{
    char ch;
    std::size_t bytes = sizeof(ch);
    std::cout << bytes << "\n";
    
    int i;
    std::cout << sizeof(i) << "\n";
    
    long l;
    std::cout << sizeof(l) << "\n";
    
    float f;
    std::cout << sizeof(f) << "\n";
    
    double d;
    std::cout << sizeof(d) << "\n";
}



/*
run:

1
4
8
4
8

*/

 

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