从键盘输入一个字符串,先把它原样显示一遍 然后将其中的小写字母转换为大写显示,再将其中的大写字母转换为小写显示,最后将其中的大小写字母互换显示.显示字符串的功能调用采用宏,大写转换,小写转换和大小写互换写成子程序.

(1). 编写一个完整的源程序完成题目的要求.

(2). 把子程序单独写在一个文件中,用源程序包含的方法完成题目要求.

(3). 把子程序单独汇编,用目标文件链接的方法完成题目要求.

(4). 把子程序加入到一个子程序库中,用子程序库调入的方法完成题目要求.

另附有库连接的资料-keyboard input from a string, It first showed once again as it stood then the lowercase letters to uppercase conversion, then the change of capital letters to lowercase, Finally, the case-insensitive swap show. show string function call using Acer, capital conversion, Lowercase conversion and exchange case-written subroutines. (1). preparation of a comprehensive program to complete the requirements of topics. (2 ). put subroutine written in a single document, with the source code contains the methods required subject. (3). put subroutine separate compilation, Links to the target file with the completion of title requirements. (4). put subroutine into a subroutine library, subroutine with the completion of the redeployment requested topics. followed by the linking of information