“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。 9%obq/Lb
Q22 GIr
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》。 Q\0'lQJdy
E' uZA
以下是用不同语言写成的Hello World程序的几个例子: */S_Icf
Ada Ab;.5O$y
with Ada.Text_Io; use Ada.Text_Io; t sRdvFFq
procedure Hello is A^S gI-y|
begin <IW$m!{VG
Put_Line ("Hello, world!"); @IZnFHN
end Hello; ~pky@O#b
uCB=u[]y4
;722\y(Y
汇编语言 ;-Aa|aT!
+1!ia]
x86 CPU,DOS,TASM >+T)#.wo&
MODEL SMALL f*
wx<
IDEAL fI|$K)K
STACK 100H + LJ73
!
4?01s-Y
DATASEG L-&\\{X
HW DB 'Hello, world!$' _,*r_D61S
KqP#6^ _
CODESEG 4Wp=y
MOV AX, @data ;mi%F3
MOV DS, AX bcz:q/f}@
MOV DX, OFFSET HW 9:lFo=
MOV AH, 09H -trkA'ewZ
INT 21H F((4U"
MOV AX, 4C00H 0<*<$U
INT 21H Vi|#@tC'
END {Y1Ck5
tpx2IE
HjwE+: w
x86 CPU,GNU/Linux,NASM b7ZSPXV
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). NwfVL4Xg
;Enter this into "hello.asm" then type: tO&^>&;5
;"nasm -f elf hello.asm" N6TH}~62}
;"ld hello.o -o hello" 86H+h(R/
;"./hello" |5 ]X| v
`EQL" =)
section .data ;data section declaration aDN`6[
msg db 'Hello World!',0AH 3$
PV2"
len equ $-msg ;string length TkF[x%o
^=*;X;7
section .text ;code section declaration ]I6 J7A[
global _start ;entry point (start of execution) u$`a7Lp,n
_start: mov edx,len ;string length lk =<A"^S
mov ecx,msg ;string start !PE]C!*gv&
mov ebx,1 ;file handle: stdout 1AFA=t:]p
mov eax,4 ;sys_write wdoR%b{M
int 80h ;kernel system call dgP3@`YS
#p{4^
mov ebx,0 ;return value uEx-]F
mov eax,1 ;sys_exit YchH~m|
int 80h ;kernel system call _','9|
{\\Tgs
U%/+B]6jP
x86 CPU,Windows,MASM32 FC4wwzb
.386 f,Ghb~y
.model flat,stdcall !TcJ)0
option casemap:none bN=P*hdf
;Include 文件定义 [PbOfxxgA
include windows.inc &6k3*dq
include user32.inc 7PF%76TO
includelib user32.lib 51.%;aY~z
include kernel32.inc 5E
<kwi
includelib kernel32.lib [.}oyz;}N
;数据段 ;O#>Y
.data q0\6F^;M
szCaption db 'A MessageBox!',0 ]K%!@O!
szText db 'Hello,world!',0 ]JR +ayk7
;代码段 M'l ;:
.code OB}Ib]
start: yF/j Fn
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK aQI(Y^&%3
invoke ExitProcess,NULL .o}v#W+st
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> wS3'?PRX
end start a09<!0Rp
y~HP>~Oh
W(/h Vt
AWK HLi%%"'
BEGIN { print "Hello, world!" } CTA3*Gn
(uidNq
hFBe,'3M
BASIC ]}X
传统版BASIC(例如GWBASIC): J?$,c4;W2
'4<1 1(U
10 PRINT "Hello, world!" P1f[%1
20 END -D~%|).'
|vzl. ^"-
或在提示符输入: h@wgd~X9
lk80#( :Z
?"Hello, world!":END e@YK@?^#N
r,2g^K)6
现代版BASIC(例如Quick BASIC): rQ snhv
An/|+r\
Print "Hello, world!" >c}u>]D
AkiDL=;w
以下的语句在Quick BASIC中同样有效: .5{ab\_af
=H]@n|$(
? "Hello,world!" 2I{"XB
pI<f) r
l}M!8:UzU
BCPL o[D9I
hs
GET "LIBHDR" Srd4))2/0
is@?VklnB
LET START () BE 5Jnlz@P9
$( E&:,oG2M
WRITES ("Hello, world!*N") <ZR9GlIr
$) \z}
Ic%Tp
+8ZF"{y
q-d:TMkc
Befunge Y`wSv NU
"!dlrow olleH">v 8*a&Jl
, `~q <N
^_@ r9G>jiw8
L9#g)tf
8T
jZrq{Z<
Brainfuck ~WV"SaA)*U
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< ]')RMg zM*
+++++++++++++++.>.+++.------.--------.>+.>. IV)j1
jmW7)jT8:
kB%JNMF{A
C y1L,0 ]
#include <stdio.h> 7"D.L-H
)@bQu~Y
int main(void) #:%/(j
{ "U"Z 3*
printf("Hello, world!\n"); |#N&