“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。 4Y[uqn[
mV0.9pxS
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》。 09{B6l6P
g
pN{1
以下是用不同语言写成的Hello World程序的几个例子: 0#
D4;v
Ada p<\yp<g
with Ada.Text_Io; use Ada.Text_Io; `4&
GumG
procedure Hello is (0Xgv3wd
begin D<zgs2Ex
Put_Line ("Hello, world!"); 3sf+u oV
end Hello; >900O4
IGj%)_W
P%v7(bqL4+
汇编语言 e{~s\G8g
VQ/<MY C
x86 CPU,DOS,TASM |.x |BJ
MODEL SMALL .r/6BDE"
IDEAL zice0({iJ
STACK 100H Azun"F_f
C~.7m-YW
DATASEG AKVll
HW DB 'Hello, world!$' gu[3L
0i2ZgOJ
CODESEG DbdxHuKa>
MOV AX, @data cCd2f>EHw
MOV DS, AX );*A$C9RA
MOV DX, OFFSET HW `Tx1?]
MOV AH, 09H :bxq%D%|o
INT 21H OQ>r;)/
MOV AX, 4C00H Br2ZloJ@+
INT 21H Ldnw1xy
END 2-9'zN0u
T.vkGB=QZ%
@3/.W +
x86 CPU,GNU/Linux,NASM 6@TGa%:G
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). $\xS~w
;Enter this into "hello.asm" then type: *%^Vq
;"nasm -f elf hello.asm" iol.RszlZ|
;"ld hello.o -o hello" URbu=U
;"./hello" DS,"^K
}5Yd:%u5
section .data ;data section declaration v*+.;60_
msg db 'Hello World!',0AH _e<3 g9bj
len equ $-msg ;string length p.9VyM
Tz H*?bpP
section .text ;code section declaration S.bB.<
global _start ;entry point (start of execution) Y4Hi<JWo
_start: mov edx,len ;string length n%lY7.z8d
mov ecx,msg ;string start _u$X.5Q;
mov ebx,1 ;file handle: stdout ULq#2l
mov eax,4 ;sys_write d>z?JDt
int 80h ;kernel system call =6Dz<Lq
Z[Gs/D
mov ebx,0 ;return value 1/>#L6VAZ
mov eax,1 ;sys_exit IT a8*Myj
int 80h ;kernel system call 4@D 8{?$~Q
N-fGc?E
>E&mNp
x86 CPU,Windows,MASM32 P%hi*0pwZ
.386 v:c_q]z#B
.model flat,stdcall hm=E~wv'L
option casemap:none ;6g &_6
;Include 文件定义 <QGf9{m
include windows.inc Omkl|l9
include user32.inc w:l/B
'%]Y
includelib user32.lib &BnK[Q8X
include kernel32.inc FWNO/)~t
includelib kernel32.lib c!Gnd*!?-
;数据段 <(rf+Ou>I
.data -I7"9}j3
szCaption db 'A MessageBox!',0 -,NiSh}A
szText db 'Hello,world!',0 1s4+a^&
;代码段 u9Wi@sO#
.code :jB8Q$s
start: Z `FqC
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK LMchNTL
invoke ExitProcess,NULL 0?3Ztdlb
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> >'4Bq*5>
end start %xE\IRlR
)v&r^DR_
mAkR<\?iTF
AWK *Z*4L|zT
BEGIN { print "Hello, world!" } R9X*R3nB
+Z0@z^6\
)jbYWR*&
BASIC <X}@afS
传统版BASIC(例如GWBASIC): f)x^s$H
ngM>Tzirt
10 PRINT "Hello, world!" W)I)QinOH
20 END x/Pi#X m
v=15pW
或在提示符输入: nlaJ
{64od0:T
?"Hello, world!":END /an$4?":~
~GJJ{Bm_
现代版BASIC(例如Quick BASIC): GQXN1R
MsMNP[-l
Print "Hello, world!" ^v.~FFK
X(F2 5
以下的语句在Quick BASIC中同样有效: W]p)}#FR
0\f3L a
? "Hello,world!" r'7>J:cy=
#Jt9U1WbF
@RW=(&<1
BCPL E"7 iU
GET "LIBHDR" 5tMp@$F\{[
vy?Zz<c;
LET START () BE 6;g_}Zx
$( oTj9 /r
WRITES ("Hello, world!*N") AyZL(
$) n gA&PU
swv1>52{
{]1+01vI-
Befunge |IL..C
"!dlrow olleH">v `!<RP'
, %dMq'j
^_@ 0q`n] NM
<%fcs"Mb
4J3cQ;z
Brainfuck B>, O@og
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< Op^r }7
+++++++++++++++.>.+++.------.--------.>+.>. $OK}jSH*v)
jRP.Je@t
EAYx+zI
C j#e^PK <
#include <stdio.h> IM:*uv
.[Ezg(U}ze
int main(void) q1QrtJFPG
{ [5$=G@ zf
printf("Hello, world!\n"); Q C?*O?~#
return 0; SB
R=
} A7!!kR":
<4Z;a2l}U
-}nTwx:|5u
C++ ^Wk.D-
#include <iostream> $y~!ePKh
i,jPULzyjk
int main() uXPvl5(Y?
{ 8w &