定义函数up(ch)，如字符变量ch是小写字母就转换成大写字母并通过up返回，否则字符ch不改变。要求在短小而完全的程序中显示这个程序是怎样被调用的。-Define function up (ch), such as the character variable ch a lowercase letter is converted into capital letters and through up to return to, or character ch don t change. The requirements in the short and complete program shows how the program is invoked.