//this program will rely heavily on template functions/templates, so that the program can work with any chosen data type //this is a console based calculator, but i intend to make graphics based one in the future. // in the next version, i plan to have as many desired numbers as possible, and maybe even more complex calculations. #include #include using namespace std; template //C, as in calculator. class calculator { private: C firstNumber; C secondNumber; //note: all functions in this class must have the return type of c. public: calculator(C FN, C SN) : firstNumber(FN), secondNumber(SN) {}; //constructor //base calculations for the computer to perform. C addition() { cout << "The sum of the two numbers is: " << firstNumber + secondNumber << endl; return firstNumber + secondNumber; } C subtraction() { cout << "The remainding sum of the two numbers is: " << firstNumber - secondNumber << endl; return firstNumber - secondNumber; } C multiplication() { cout << "The Product of the two entered numbers is: " << firstNumber * secondNumber << endl; return firstNumber * secondNumber; } C division() { cout << "The divided sum of the two numbers is: " << firstNumber / secondNumber << endl; return firstNumber / secondNumber; } C operation() { cout << "Enter the value of the first number: " << endl; cin >> firstNumber; cout << "Enter the value of the second number: " << endl; cin >> secondNumber; string operation; cout << "enter the desired operation: " << endl; cin >> operation; while (operation != "*" && operation != " *" && operation != " +" && operation != "+" && operation != "/" && operation == " /" && operation != "-" && operation != " -") { cout << "This operation is invalid, please try again. " << endl; cin >> operation; } if (operation == "*" || operation == " *") { multiplication(); } else if (operation == " /" || operation == "/") { division(); } else if (operation == "+" || operation == " +") { addition(); } else if (operation == "-" || operation == " -") { subtraction(); } return 0; } }; int main() { calculatoruser(0,0); user.operation(); cin.get(); return 0; }

Calculator using templates(incomplete)