Could you guys tell me why this piece of code returns 0 instead of looking for user input? C++

Question

#include <iostream>

using namespace std;

int add(int arr[], int size) {
cout<<"How many numbers do you want to add?"<<endl;
cin >> size ;
for(int x=0;x<size;x++){
    cout<<"Please enter a number that you wish to have in your sum"<<endl;
    cin >> arr[x] ;
    int sum=0;
    sum+=arr[x] ;
    return sum ;
}
}
 int main(){
     int add();
}

Answer 1

You made a lot of mistakes. Study the following code to see your mistakes.

#include <iostream>

using namespace std;

int addf(int arr[], int size)
{
    int sum=0;
    cout<<"How many numbers do you want to add?"<<endl;
    cin >> size ;
    for(int x=0;x<size;x++)
    {
       cout<<"Please enter a number that you wish to have in your sum"<<endl;
       cin >> arr[x] ;
       sum+=arr[x] ;
    }
    return sum ;
}

 int main(){
     int A[5];
     int r = addf(A, sizeof(A));
     cout<<"Sum is "<<r;
}

Comments

Thank you! So basically my method was correct but my approach was flawed

---

Why do you need int A[5]

Answer 2

actually you have written int add(); complier treats as declaration of a function. so main didn't call any function.