统计成绩.asm

用汇编变成

DATA SEGMENT
GRADE DB 78,89
COUNT EQU $-GRADE
AVER_IN DB ?
AVER_FRAC DB ?
A DB 0
B DB 0
C1 DB 0
D DB 0
E DB 0
DATA ENDS
CODE SEGMENT
     ASSUME CS:CODE,DS:DATA
START:MOV AX,DATA
      MOV DS,AX
      MOV DI,OFFSET GRADE
      MOV CX,COUNT
      CALL AVERAGE
LOP:MOV BL,[DI]
    CMP BL,90
    JGE EXCELLENT
    CMP BL,80
    JGE GOOD
    CMP BL,70
    JGE SECONDARY
    CMP BL,60
    JGE PASS
    INC E
    JMP EXIT
EXCELLENT:INC A
          JMP EXIT
GOOD:INC B
     JMP EXIT
SECONDARY:INC C1
          JMP EXIT
PASS:INC D
EXIT:INC DI
     LOOP LOP
     MOV AH,4CH
     INT 21H
AVERAGE PROC
        PUSH AX
        PUSH BX
        PUSH CX
        XOR AX,AX
        MOV BX,OFFSET GRADE
        XOR CH,CH
        MOV CL,COUNT-1
        MOV AL,[BX]
LOOP_LABLE:INC BX
           ADD AL,[BX]
           ADD AH,0
           LOOP LOOP_LABLE
           MOV CL,COUNT
           DIV CL
           MOV AVER_IN,AL
           MOV AL,AH
           MOV CH,10
           MUL CH
           DIV CL
           MOV AVER_FRAC,AL
           POP CX
           POP BX
           POP AX
           RET
AVERAGE ENDP
CODE ENDS
     END START