// C3_4.cpp : Defines the entry point for the console application.
// goto 無條件分支指令 -- 單位轉換

#include "stdafx.h"
#include <iostream>

using namespace std;


int main(int argc, char* argv[])
{
	 int data = 0;                     //宣告變數及設定初始值
	 int I = 0;
     double  meters = 0;
start:   cout << endl
        << " @@@ 公尺與英制轉換！ @@@" << endl
        << "選擇下列轉換單位 : "
        << endl
        << endl << "1 吋"
        << endl << "2 呎"
        << endl << "3 碼"
        << endl << "4 哩"
		<< endl << "5 離開"
        << endl << endl << "請輸入公尺數 ? ";
        cin >> meters;
		cout << endl << "請輸入選擇 : ";
		cin >> data;
		cout << endl;
  if( data == 5 ) 
      goto endp;   // goto 敘述
 
	  switch(data)
	  {
      case 1: cout << endl << meters << " 公尺 = " << meters * 39.37 << " 吋" << endl;
              break;
      case 2: cout << endl << meters << " 公尺 = " << meters * 3.28084 << " 呎" << endl;
              break;
      case 3: cout << endl << meters << " 公尺 = " << meters * 1.09361 << " 碼" << endl;
              break;
      case 4: cout << endl << meters << " 公尺 = " << meters * 0.00062 << " 哩" << endl;
              break;
      default: cout << endl <<"輸入數值錯誤, 請重新鍵入."
                    << endl;
	  }
goto start;
endp:	return 0;   // endp 標纖處
}