calc.HC

/*
  * Simple HolyC Calculator
  * Designed for TempleOS Environment
  * I'm just learning HolyC, so this is a basic implementation to demonstrate classes, functions, and exception handling.
*/

class Calc
{
  public:
    F64 Add(F64 a, F64 b) 
    {
      return a + b;
    }

    F64 Sub(F64 a, F64 b) 
    {
      return a - b;
    }

    F64 Mul(F64 a, F64 b) 
    {
      return a * b;
    }

    F64 Div(F64 a, F64 b) 
    {
      if (b == 0) 
        throw(1); // Throw exception for divide by zero
      return a / b;
    }
};

U0 Main()
{
  Calc c;
  F64 num1, num2, result;
  U8 op;
  I64 running = 1;

  Cls;
  Print("=== HolyC Calculator ===\n");
  Print("Press 'q' in operator field to quit.\n");

  while (running) {
    Print("\n------------------------\n");
    
    // Input First Number
    Print("Enter first number: ");
    Scanf("%f", &num1);

    // Input Operator
    // Note: The space before %c skips whitespace/newlines
    Print("Enter operator (+ - * / q): ");
    Scanf(" %c", &op); 

    if (op == 'q' || op == 'Q') {
      running = 0;
      continue;
    }

    // Input Second Number
    Print("Enter second number: ");
    Scanf("%f", &num2);

    // Process Calculation with Exception Handling
    try {
      switch (op) {
        case '+':
          result = c.Add(num1, num2);
          Print("Result: %f\n", result);
          break;
        case '-':
          result = c.Sub(num1, num2);
          Print("Result: %f\n", result);
          break;
        case '*':
          result = c.Mul(num1, num2);
          Print("Result: %f\n", result);
          break;
        case '/':
          result = c.Div(num1, num2);
          Print("Result: %f\n", result);
          break;
        default:
          Print("Invalid Operator!\n");
      }
    } catch (I64 err) {
      // Catch the throw(1) from Div function
      Print("Math Error: Division by Zero!\n");
    }

    Print("\nPress Enter to continue...");
    GetChar(); // Wait for user input
    Cls;       // Clear screen for next operation
  }

  Print("Goodbye.\n");
}