用C语言设计一个程序帮助小学生练习数学。
a) 程序首先让使用者输入ID号（包含前两个大写英文字母和后四个阿拉伯数字），例如：Please input your ID: AB1234
程序应该有输入验证功能。ID正确输入完毕后，程序提示以下功能选项：
(1) Start a test
(2) Check score
(3) Exit
Test: 程序给出10个数学题目，例如：
12 * 3 = 36;48 +...(C language is used to design a program to help pupils practice mathematics.
A) program first lets users enter ID number (including the first two capital letters and the latter four Arabia numbers), for example: Please input your ID: AB1234.
The program should have the input validation function. After ID has entered correctly, the program prompts the following functional options.
(1) Start a test
(2) Check score
(3) Exit
The Test: program gives 10 mathematical topics, such as:
12 * 3 = 36; 48 +...)