“Hello, World!”程序是一个只在计算机屏幕上打印出“Hello, World!”(英语,意为“世界,你好!”)字串的计算机程序。该程序通常是计算机程序设计语言的初学者所要学习编写的第一个程序。它还可以用来确定该语言的编译器、程序开发环境以及运行环境已经正确安装。 A0,h7<i
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将Hello World程序作为第一个学写的程序,现在已经成为一种传统。该程序最早出现在由Brian Kernighan和Dennis Ritchie写的计算机程序设计教程《C语言程序设计》。 KM"BHaSkF
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以下是用不同语言写成的Hello World程序的几个例子: @ZRg9M:N
Ada DwGRv:&HH
with Ada.Text_Io; use Ada.Text_Io; vmg[/#
procedure Hello is nC(Lr,(
begin 2@W`OW Njm
Put_Line ("Hello, world!"); y+p"5s"
end Hello; D#P]tt.Z
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汇编语言 R^B8** N
NxSSRv^rx
x86 CPU,DOS,TASM *zQhTYY
MODEL SMALL h=Q2
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IDEAL VTU(C&"S
STACK 100H eA*We
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DATASEG Q zg?#|
HW DB 'Hello, world!$'
//0Y#"
n-g#nEc:
CODESEG _Wq;bKG
MOV AX, @data 31\mF\{V
MOV DS, AX Z;S)GUG^
MOV DX, OFFSET HW G5%k.IRz
MOV AH, 09H _0BQnzC=
INT 21H 2}XxRJ0
MOV AX, 4C00H c/^l2CJ0
INT 21H 4
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END Y9I|s{~
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x86 CPU,GNU/Linux,NASM +@c$n`>)
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). u{7->[=
;Enter this into "hello.asm" then type: -oTdi0P
;"nasm -f elf hello.asm" p2U6B
;"ld hello.o -o hello" "[-W(=
;"./hello" n0G@BE1Y=
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section .data ;data section declaration UoaWI2
msg db 'Hello World!',0AH -g:i'e
len equ $-msg ;string length g}S%D(~
f:t j
section .text ;code section declaration 6q8PLyIp
global _start ;entry point (start of execution) r9*6=*J|
_start: mov edx,len ;string length 65nK1W`i
mov ecx,msg ;string start g6+5uvpd
mov ebx,1 ;file handle: stdout F("|SOhc
mov eax,4 ;sys_write
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int 80h ;kernel system call =J"c'Z>.
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mov ebx,0 ;return value }u1h6rd `
mov eax,1 ;sys_exit 'Fc$?$c\
int 80h ;kernel system call byTHSRt
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x86 CPU,Windows,MASM32 VoQhzp6&
.386 ty:{e]e
.model flat,stdcall =f23lA
option casemap:none JNT|h zV
;Include 文件定义 F@HJ3O9
include windows.inc A2p% Y},
include user32.inc C9_[ke[1D
includelib user32.lib xB]^^NYE=
include kernel32.inc a_]l?t
includelib kernel32.lib CMyz!jZ3
;数据段 K"hnGYt?
.data 4'tY1d
szCaption db 'A MessageBox!',0 ]omBq<ox'Y
szText db 'Hello,world!',0 'vYt_T
;代码段 !]5V{3
.code 17`-eDd
start: ?*[35XUd
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK g7lPQ_A*
invoke ExitProcess,NULL x8x-b>|$&<
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 1|AY&u%fiP
end start fz?woVn
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BEGIN { print "Hello, world!" } B&B