编写一个程序来从键盘输入20个整数（范围-128至127），并计算其最大值

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 data segment
    
 	show db "Please Input twenty numbers:$"
    
 	iit1 db "The $"
    
 	iit2 db " number is:$"
    
 	buf db 20 dup(?)
    
 	x   db ?,?,?,?  ;x[0]用来存负号
    
 	w   db ?  ;用于显示提示信息
    
 	max db ?
    
 	boundary db "128$"
    
 	display db "Max:$"
    
 	error1 db "Input error!<you can check whether it is between -128~127>",13,10,"Please Input again:$"
    
 data ends
    
  
    
 stack segment
    
  
    
 stack ends
    
  
    
 code segment
    
 assume ds:data,cs:code,ss:stack
    
 start:
    
 	m