#include using namespace std; double num1; double num2; char op; double sum; int main(){ cout << "Simple calculator, v1.0. Please type a number." << endl; cin >> num1; cout << "Please input an operator: +, -, *, or / ? : "; while (0==0){ cin >> op; if (op == '+'){ cout << num1 << " + "; cin >> num2; sum = num1 + num2; cout << num1 << " + " << num2 << " = " << sum << " : Choose another operator for " << sum << " : "; num1+=num2; }else if (op == '-'){ cout << "Type the next number for you equation." << endl; cin >> num2; sum = num1 - num2; cout << num1 << " - " << num2 << " = " << sum << " : Choose another operator for " << sum << " : "; num1-=num2; }else if (op == '/'){ cout << "Type the next number for you equation." << endl; cin >> num2; sum = num1 / num2; cout << num1 << " / " << num2 << " = " << sum << " : Choose another operator for " << sum << " : "; num1/=num2; }else if (op == '*'){ cout << "Type the next number for you equation." << endl; cin >> num2; sum = num1 * num2; cout << num1 << " * " << num2 << " = " << sum << " : Choose another operator for " << sum << " : "; num1*=num2; }else if(op=='A'){ cout << "Program aborting." << endl; return 0; } } return 0; }

Calculator, needs ran via IDE