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An Assembly Language Program that reads a character and prints it only if it is ‘?’ ( Simulation of If structure ) .
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.MODEL SMALL .STACK 100H .DATA PROMPT DB 'Enter the character : $' .CODE MAIN PROC MOV AX, @DATA ; initialize DS MOV DS, AX LEA DX, PROMPT ; load and print PROMPT MOV AH, 9 INT 21H MOV AH, 1 ; read a character INT 21H MOV BL, AL ; save the input character into BL CMP BL, "?" ; compare the input character and '?' JNZ @EXIT ; jump to label @EXIT if input character is ; not equal to '?' MOV AH, 2 ; carriage return MOV DL, 0DH INT 21H MOV DL, 0AH ; line feed INT 21H MOV AH, 2 ; print the input character MOV DL, BL INT 21H @EXIT: ; jump label MOV AH, 4CH ; return control to DOS INT 21H MAIN ENDP END MAIN |