Can you guys help me out ? The result of sum is 0 after I choose the variables and select s

Question

#include<iostream>
#include<cmath>
using namespace std;

void operations( int a, int b){
int sum;
sum =a+b;
int product;
product=a*b;

}
int main(){

int a,b;
int sum;
int product;
char calc;

cout<<"choose varaibles";
cin >> a>>b;
cout<<" Choose operation";
cin>> calc;
if (calc=='s')
cout<<" sum is"<<sum;
else if (calc=='p')
cout<<" product is "<<product;

operations(a,b);
}

Answer 1

marya collegework , that's because you are calling your function by values (meaning :- you are sending copies of variables to the function not the actual function)

Here👇is more information about passing by value and reference

https://www.geeksforgeeks.org/difference-between-call-by-value-and-call-by-reference/

Answer 2

And yes, remove those extra posts in your question , it is considered a bad practice here🙂🙃👍

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

Answer 3

İt's my first time writing a question here