The Ecere SDK - sdk/blob - installer/coursework/Chapter 5 - Structures and Enumerations/Lab5/colors/lab5colors.ec

   1 #include <stdio.h>
   2
   3 enum KnownColor
   4 {
   5    black   = 0,
   6    red     = 0xFF0000,
   7    green   = 0x00FF00,
   8    blue    = 0x0000FF,
   9    yellow  = 0xFFFF00,
  10    magenta = 0xFF00FF,
  11    cyan    = 0x00FFFF,
  12    white   = 0xFFFFFF,
  13 };
  14
  15 char GetOperation()
  16 {
  17    char operation = 0;
  18    PrintLn("Chose an operation to perform: +, -. q to quit.");
  19    do
  20    {
  21       char input[1024];
  22       gets(input);
  23       switch(input[0])
  24       {
  25          case '+': case '-': case 'q':
  26             operation = input[0];
  27             break;
  28          default:
  29             PrintLn("Invalid Operation");
  30       }
  31    } while(!operation);
  32    return operation;
  33 }
  34
  35 KnownColor GetOperand()
  36 {
  37    KnownColor operand;
  38    char input[1024];
  39    gets(input);
  40    while(!operand.OnGetDataFromString(input))
  41    {
  42       Print("Please enter a known color (black, red, green, blue, yellow, magenta, cyan or white)");
  43       gets(input);
  44    }
  45    return operand;
  46 }
  47
  48 KnownColor ComputeOperation(char operation, KnownColor operand1, KnownColor operand2)
  49 {
  50    switch(operation)
  51    {
  52       case '+': return operand1 + operand2;
  53       case '-': return operand1 - operand2;
  54    }
  55 }
  56
  57 class Lab5ColorsApp : Application
  58 {
  59    void Main()
  60    {
  61       while(true)
  62       {
  63          KnownColor operand1, operand2;
  64          char operation = GetOperation();
  65          if(operation == 'q') break;
  66
  67          PrintLn("Enter the first operand:");
  68          operand1 = GetOperand();
  69          PrintLn("Enter the second operand:");
  70          operand2 = GetOperand();
  71          {
  72             KnownColor result = ComputeOperation(operation, operand1, operand2);
  73             PrintLn(operand1, " ", operation, " ", operand2, " = ", result);
  74          }
  75       }
  76       system("pause");
  77    }
  78 }