program making simple calculator using function (POP) (150)

#include<iostream>

using namespace std;

void sum()

{

int n1,n2;

cout<<"enter first number:";

cin>>n1;

cout<<"enter second number:";

cin>>n2;

cout<<"the sum is:"<<n1+n2<<endl;

}

void sub()

{

int n1,n2;

cout<<"enter first number:";

cin>>n1;

cout<<"enter second number:";

cin>>n2;

cout<<"the sub is:"<<n1-n2<<endl;

}

void product()

{

int n1,n2;

cout<<"enter first number:";

cin>>n1;

cout<<"enter second number:";

cin>>n2;

cout<<"the product is:"<<n1*n2<<endl;

}

void div()

{

int n1,n2;

cout<<"enter first number:";

cin>>n1;

cout<<"enter second number:";

cin>>n2;

cout<<"the division is:"<<n1/n2<<endl;

}

void menu()

{

cout<<"press 1 for addition:"<<endl;

cout<<"press 2 for subraction:"<<endl;

cout<<"press 3 for multiply:"<<endl;

cout<<"press 4 for division:"<<endl;

}

int main()

{

int n;

menu();

cin>>n;

if(n==1)

sum();

else if(n==2)

sub();

else if(n==3)

product();

else if(n==4)

div();

else

cout<<"you entered wrong input";

}