要求程序建立一个可存放50项的电话号码表，每项包括人名（20个字符）及电话号码（8个字符）两部分。程序可接收输入人名及相应的电话号码，并把它们加入电话号码表文件中；凡有新的输入后，程序应按人名对电话号码表重新排序，并写入电话号码文件中；程序可接收需要查找电话号码的人名，并从电话号码表文件中查出其电话号码，再在屏幕上以如下格式显示出来。

-Requires the program to build a store 50 phone numbers table, each including the names (20 characters) and telephone number (8 characters) in two parts. Program can receive input names and corresponding phone number, and add them to the phone number table file　where new input, the program names of phone numbers should be reordered, and phone number written document　the program can receive need to find a phone number of the names and phone numbers from the telephone number found in the file, and then on the screen in the format displayed.