要求编写一个程序，模拟电话卡系统。系统运行时直接生成若干张电话卡，用户在使用时，系统提示输入卡号和密码，卡号和密码和某张电话卡相同，就使用该电话卡。登陆后，提示输入电话号码，每拨出一个正确的号码，卡中余额扣除0.5元。-Requested to prepare a program, analog phone card system. Directly generate the system is running a number of telephone cards, users use, the system prompted to enter the card number and password, card number and password, and a phone card the same as the use of the phone cards. After making landfall, prompted telephone numbers, each set aside a correct number, card balances deducted 0.5 yuan.