Instructions
Objective
Write a program in Flat Assembler (not Visual Studio) to display 3 random numbers and a fortune cookie phrase (at random), Assembly language.
Requirements and Specifications
Submit the asm source code file on Ecampus under the "Submit Homework" menu option.
Write an ×x86 assembly program that outputs three random numbers from 1-25 with no duplicates. Next, output a random inspirational quote.
Screenshots of output
Source Code
format PE console
entry _start
include 'win32a.inc'
header: DB "Here are three distinct (not duplicate) random numbers from 1-25:", 10, 13, 0
msg1: DB "May the fourth be with you!", 10, 13, 0
msg2: DB "So long, and thanks for all the fish!", 10, 13, 0
msg3: DB "Where we're going, we don't need roads!", 10, 13, 0
msg4: DB "Live long and prosper!", 10, 13, 0
msg5: DB "It always seems impossible until it's done!", 10, 13, 0
intfmt: DB "%d", 10, 13, 0
newline: DB 10, 13, 0
num1: DD 0
num2: DD 0
num3: DD 0
section '.text' code readable executable
_start:
push ebp
mov ebp, esp
; initialize random generator
push 0 ; push a zero
call [time] ; get current time
add esp, 4 ; restore stack
push eax ; pass time to srand
call [srand] ; set random seed
add esp, 4 ; restore stack
; print header message
push header ; load address of message
call [printf] ; print the string
add esp, 4 ; restore stack
mov ebx, 25 ; load 25 for making divisions
call [rand] ; generate a random number
mov edx, 0 ; clear edx before division
div ebx ; divide random number by 25 to get remainder 0-24
inc edx ; add 1 to remainder to get number 1-25
mov [num1], edx ; save number 1
push edx ; pass number 1
push intfmt ; pass integer format
call [printf] ; print number 1
add esp, 8 ; restore stack
gen2:
call [rand] ; generate second random number
mov edx, 0 ; clear edx before division
div ebx ; divide random number by 25 to get remainder 0-24
inc edx ; add 1 to remainder to get number 1-25
cmp edx, [num1] ; see if number is repeated
je gen2 ; if repeated, generate another one
mov [num2], edx ; save number 2
push edx ; pass number 2
push intfmt ; pass integer format
call [printf] ; print number 2
add esp, 8 ; restore stack
gen3:
call [rand] ; generate third random number
mov edx, 0 ; clear edx before division
div ebx ; divide random number by 25 to get remainder 0-24
inc edx ; add 1 to remainder to get number 1-25
cmp edx, [num1] ; see if number is repeated
je gen3 ; if repeated, generate another one
cmp edx, [num2] ; see if number is repeated
je gen3 ; if repeated, generate another one
mov [num3], edx ; save number 3
push edx ; pass number 3
push intfmt ; pass integer format
call [printf] ; print number 3
add esp, 8 ; restore stack
; generate random quote
call [rand] ; generate second random number
mov ebx, 5 ; load 5 to make division
mov edx, 0 ; clear edx before division
div ebx ; divide random number by 5 to get remainder 0-4
cmp edx,0 ; if remainder is 0,
je quote1 ; print quote 1
cmp edx,1 ; if remainder is 1,
je quote2 ; print quote 2
cmp edx,2 ; if remainder is 2,
je quote3 ; print quote 3
cmp edx,3 ; if remainder is 3,
je quote4 ; print quote 4
jmp quote5 ; else, remainder is 4, print quote 5
quote1:
mov eax, msg1 ; load quote 1 address
jmp printQuote
quote2:
mov eax, msg2 ; load quote 2 address
jmp printQuote
quote3:
mov eax, msg3 ; load quote 3 address
jmp printQuote
quote4:
mov eax, msg4 ; load quote 4 address
jmp printQuote
quote5:
mov eax, msg5 ; load quote 5 address
printQuote:
; print quote message
push eax ; load address of message
call [printf] ; print the string
add esp, 4 ; restore stack
call [getchar] ; wait until user presses a key
mov ebp, esp
pop ebp
call [ExitProcess] ; exit the program
; Import section
section '.idata' import data readable
library kernel32, 'kernel32.dll', \
msvcrt,'msvcrt.dll'import kernel32, \
ExitProcess,'ExitProcess'
import msvcrt, \
printf, 'printf', time, 'time', \
srand, 'srand', rand, 'rand', \
getchar, 'getchar'