//  do-while -tsükli kasutamine lihtsa abiinfosüsteemi loomiseks.
class Menu {
  public static void main(String args[]) 
    throws java.io.IOException {   // Juhuks kui sisestamisel tekib "erakordne" situatsioon
    char choice;

    do {
      System.out.println("Info käsust:");
      System.out.println("  1. if");
      System.out.println("  2. switch");
      System.out.println("  3. while");
      System.out.println("  4. do-while");
      System.out.println("  5. for\n");
      System.out.println("Vali :");
      choice = (char) System.in.read();   // Ootame kuni sisestatakse klahvistikult üks sümbol
    } while( choice < '1' || choice > '5');  // Vale sisestuse korral kordame !

    System.out.println("\n");
 
    switch(choice) {
      case '1':
        System.out.println(" if:\n");
        System.out.println("if(tingimus) operaator1;");
        System.out.println("else operaator2;");
        break;
      case '2':
        System.out.println(" switch:\n");
        System.out.println("switch(avaldis) {");
        System.out.println("  case konstant:");
        System.out.println("    operaatorijada");
        System.out.println("  break;");
        System.out.println("  // ...");
        System.out.println("}");
        break;
      case '3':
        System.out.println(" while:\n");
        System.out.println("while(tingimus) operaator;");
        break;
      case '4':
        System.out.println(" do-while:\n");
        System.out.println("do {");
        System.out.println("  operaator(id);");
        System.out.println("} while (tingimus);");
        break;
      case '5':
        System.out.println(" for:\n");
        System.out.print("for(initsialiseerimine; tingimus; iteratsioon)");
        System.out.println(" operaator;");
        break;
    }
        System.out.println();

  }
}