/*
   The finished Java statement Help system 
   that process multiple requests.
*/
class Help3 {
  public static void main(String args[]) 
    throws java.io.IOException {
    char choice;

    for(;;) {
      do {
        System.out.println("Help on:");
        System.out.println("  1. if");
        System.out.println("  2. switch");
        System.out.println("  3. for");
        System.out.println("  4. while");
        System.out.println("  5. do-while");
        System.out.println("  6. break");
        System.out.println("  7. continue\n");
        System.out.print("Choose one (q to quit): ");
        do {
          choice = (char) System.in.read();
        } while(choice == '\n' | choice == '\r');    
      } while( choice < '1' | choice > '7' & choice != 'q');

      if(choice == 'q') break;

      System.out.println("\n");
 
      switch(choice) {
        case '1':
          System.out.println("The if:\n");
          System.out.println("if(condition) statement;");
          System.out.println("else statement;");
          break;
        case '2':
          System.out.println("The switch:\n");
          System.out.println("switch(expression) {");
          System.out.println("  case constant:");
          System.out.println("    statement sequence");
          System.out.println("    break;");
          System.out.println("  // ...");
          System.out.println("}");
          break;
        case '3':
          System.out.println("The for:\n");
          System.out.print("for(init; condition; iteration)");
          System.out.println(" statement;");
          break;
        case '4':
          System.out.println("The while:\n");
          System.out.println("while(condition) statement;");
          break;
        case '5':
          System.out.println("The do-while:\n");
          System.out.println("do {");
          System.out.println("  statement;");
          System.out.println("} while (condition);");
          break;
        case '6':
          System.out.println("The break:\n");
          System.out.println("break; or break label;");
          break;
        case '7':
          System.out.println("The continue:\n");
          System.out.println("continue; or continue label;");
          break;
      }
      System.out.println();
    }
  }
}