增加问题

code/itsuwari/sum.asm

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+TITLE Just sum 3 integers
+;
+;用汇编语言编写程序，从屏幕上输入三个数，若三个数都不为零，则计算三个数相加的和，并显示在屏幕上，否则在屏幕上显示提示信息“Invalid vote ”，并重新显示等待数据输入的提示信息。输入Q，程序结束。
+INTERGER_COUNT = 3
+
+.data
+str1 byte "enter a integer:",0
+str2 byte "the sum of integers is:",0
+str3 byte "Invalid vote", 0
+array dword INTERGER_COUNT dup(?)
+
+
+;************************************************************
+;temp:  esi:数组的首地址,长度为4个字节
+;           ecx:数组元素个数
+;************************************************************
+.code
+main PROC
+    call clrscr
+    mov esi,offset array
+    mov ecx,INTERGER_COUNT
+    call promptforintegers
+    call arraysum
+    call displaysum
+    exit
+main ENDP
+
+;-----------------------------------------------
+;                   输入数字
+;-----------------------------------------------
+promptforintegers PROC USES ecx edx esi
+    mov edx,offset str1
+L1:
+    call writestring
+    call readint
+    call crlf
+    mov [esi],eax
+    add esi,type dword
+    loop L1
+    ret
+promptforintegers ENDP
+
+;--------------------------------------------------------
+;                   求和
+arraysum PROC USES esi ecx edx
+    mov edx,0
+L1:
+    add edx,[esi]
+    add esi,type dword
+    loop L1
+    mov eax,edx
+    ret
+arraysum ENDP
+;---------------------------------------------------------
+
+;----------------------------------------------------------
+;                   显示和
+displaysum PROC USES edx
+;----------------------------------------------------------
+    mov edx,offset str2
+    call writestring
+    call writeint
+    call crlf
+    ret
+displaysum ENDP
+;----------------------------------------------------------
+end main