A simple calculator I made that seems to be working quite well.
Updated: 14th May 2020
#include <iostream>
using namespace std;
void calculator();
void credits();
main()
{
calculator();
credits();
return 0;
}
void calculator(){
char calc;
float num1, num2;
std::cout << ("Enter your calculation symbol, +, -, *, or / \n");
cin >> calc;
std::cout << ("Enter first number:\n");
cin >> num1;
std::cout << ("Enter second number:\n");
cin >> num2;
std::cout << ("Your sum ") << num1 << " " << calc << " " << num2 << " " << ("= " );
switch (calc) {
case '+':
cout << num1 + num2;
break;
case '-':
cout << num1 - num2;
break;
case '*':
cout << num1 * num2;
break;
case '/':
cout << num1 / num2;
break;
default:
cout << "Can not complete sum - Please follow on screen instructions";
break;
}
}
void credits(){
puts("\n\n\nThank you for choosing to test this product. This was made as part of the learning process of C and C++.\nWhy not check out more of my small projects on my blog:\nwww.stephenwilde.net");
}
Previous code:
#include <iostream>
using namespace std;
main()
{
char calc;
float num1, num2;
std::cout << ("What would you like to do, +, -, *, or / \n");
cin >> calc;
std::cout << ("Enter first number:\n");
cin >> num1;
std::cout << ("Enter second number:\n");
cin >> num2;
std::cout << ("Your sum ") << num1 << calc << num2 << ("=" );
switch (calc) {
case '+':
cout << num1 + num2;
break;
case '-':
cout << num1 - num2;
break;
case '*':
cout << num1 * num2;
break;
case '/':
cout << num1 / num2;
break;
default:
cout << "Can not complete sum - Please follow on screen instructions";
break;
}
return 0;
} 
