Does this code gives size of variable i.e based upon operator ....does it give size of operations

Question

#include <iostream>
using namespace std;

int main()
{
cout << "char: " << sizeof(char) << endl;
cout << "int: " << sizeof(int) << endl;
cout << "float: " << sizeof(float) << endl;
cout << "double: " << sizeof(double) << endl;
int var = 50;
cout << "var: " << sizeof(var) << endl;
int a,b,c;

int a=10;
int b= 20;
int c= 30;
cout<< "value of sum"<< a+b+c<< endl;
cout << a+b+c<< sizeof(b)<<endl;

return 0;
}

Answer 1

Please share the code

https://www.sololearn.com/discuss/1316935/?ref=app

Answer 2

Wikipedia gives detailed explanation of this operator:

https://en.m.wikipedia.org/wiki/Sizeof