`#include <iostream>
#include <cmath>
typedef std::string string;
int main(){
string name;
int age;
int questions;
//calculator symbols
char symbol;
int num1;
int num2;
int result;
std::cout << "what's your name?: ";
std::getline(std::cin >> std::ws , name);
std::cout << "Hello " << name << " how old are you?: ";
std::cin >> age;
if(age >= 13){
std::cout << "welcome " << name << " to my website!";
}
else{
std::cout << "Hello (" << name << ") sorry you can't enter the website you are not old enough! 13+";
}
std::cout << " Thanks you for telling us about you we have Calculator Service CLICK #1 in the keyboard and if you want to cancel CLICK #2 in the keyboard: ";
std::cin >> questions;
switch(questions){
case 1:
std::cout << "choose (- + / *): ";
std::cin >> symbol;
std::cout << "#1: ";
std::cin >> num1;
std::cout << "#2: ";
std::cin >> num2;
result = (num1, num2);
std::cout << "result = " << result;
break;
case 2:
std::cout << "Thanks for Sign Up in our service see you soon :)";
break;
// done
switch(symbol){
case '+':
result = num1 + num2;
break;
case '/':
result = num1 / num2;
break;
case '*':
result = num1 * num2;
break;
case '-':
result = num1 - num2;
break;
}
}
}`