/*This program will perform calculations similar to a calculator by asking user what type of mathematical mode to perform, obtaining 2 inputs and performing operation. Contains 1 function for input, one function for outputs, and one function to perform mathematical functions.*/
#include <iostream>
#include <cstdlib>
using namespace std;
int menu_func();
int user_input();
int calc_output(int, int, int);
int main()
{
int function= menu_func();
int userinput1= user_input();
int userinput2= user_input();
int answer= calc_output(function, userinput1, userinput2);
cout << function << endl;
cin >> function;
cout << userinput1;
cin >> userinput1;
cout << userinput2;
cin >> userinput2;
cout <<" The answer is " << answer << endl;
return 0;
}
//request user to choose a mathematical operation
int menu_func()
{
int choice;
cout << "Please choose a mathematical function by selecting "
<< "a number " << endl;
cout << "1 Addition " << endl;
cout << "2 Subtraction " << endl;
cout << "3 Multiplication " << endl;
cout << "4 Division " << endl;
cout << "5 Exit " << endl;
cout << "Enter choice: ";
cin >> choice;
return (choice);
}
//obtain number inputs from user
int user_input()
{
int numberchoice;
cout << "Please input a number: ";
cin >> numberchoice;
return (numberchoice);
}
//calculations of chosen operator and numbers
int calc_output(int option, int input1, int input2)
{
while ( option < 5 || option > 0 && option != 5 );
switch (option)
{
case '1':
int add = (input1 + input2);
return (add);
break;
case 2:
int subtract = (input1 - input2);
return (subtract);
break;
case 3:
int multiply = (input1 * input2);
return (multiply);
break;
case 4:
int divide = (input1 / input2);
return (divide);
break;
default:
cout << "Error " << endl;
}
}
//calculations of chosen operator and numbers
int calc_output(int option, int input1, int input2)
{
while ( option < 5 || option > 0 && option != 5 );
switch (option)
{
case '1':
int add = (input1 + input2);
return (add);
break;
case 2:
int subtract = (input1 - input2);
return (subtract);
break;
case 3:
int multiply = (input1 * input2);
return (multiply);
break;
case 4:
int divide = (input1 / input2);
return (divide);
break;
default:
cout << "Error " << endl;
}
}