Can anyone find error in this code ??also write correct code for same

Question

#include <iostream>
using namespace std;

class addition
{
private:
int a,b,sum;

public:

void first_number{
cout<<"enter first number:-";
cin>>a;

void second_number{
cout<<"enter second number";
cin>>b;

void total{
sum=a+b;
cout<<"sum of these two number is:-";

};

int main(){
int hellow;
hellow.first_number();
hellow.second_number();
hellow.total();
}

Answer 1

The problem in your code include:
- function definition does not declare parameters.
- you forgot to put '}' for close the function.
- not declare an object of class Addition.
- you forgot to calculate the sum and print to the screen.

Solution

#include <iostream>
using namespace std;

class Addition
{
private:
int a,b,sum;
public:

void first_number(){
cout<<"enter first number: ";
cin>>a;
}

void second_number(){
cout<<"enter second number";
cin>>b;
}

void total(){
sum=a+b;
cout<<"sum of these two number is: "<< sum <<endl;
}
};

int main(){
Addition obj;
obj.first_number();
obj.second_number();
obj.total();
}

Answer 2

Phurinat Puekkham, just as a note, you removed the variable sum but still try to access it inside total(). Either add the field again or remove the statement
sum = a + b;
from the definition of total().
Also, for the sake of encapsulation, the fields a and b should remain private.
Otherwise correct explanation. :)

Answer 3

Shadow Oh my bad, Thank you for correcting me.

Answer 4

Thx