说明：  这是我上汇编实验课做的三个实验程序，功能可以是输入一个小写字母显示对应的大写字母，还有输入一串字符串，识别并且计数其不同类字符的个数
(This is my compilation of the experimental class to do three experimental procedures, functions can enter a lower-case letters show the corresponding capital letters, there are a bunch of string input to identify and count the number of different types of characters)