“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。 O4N-_Kfp/
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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》。 bKByU{t
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以下是用不同语言写成的Hello World程序的几个例子: fCr\u6Tb
Ada Gql`>~
with Ada.Text_Io; use Ada.Text_Io; tIp{},bQ^
procedure Hello is <N-=fad]
begin QXB|!'
Put_Line ("Hello, world!"); "qgu$N4/>
end Hello; {NV:|M !
\=Nm5:
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汇编语言 dr{1CP
|i u2&p >
x86 CPU,DOS,TASM Ju4.@
MODEL SMALL hk.yR1Y|
IDEAL 0+|>-b/%
STACK 100H u>m'FECXj
Otxa<M+"
DATASEG Ysl9f1>%
HW DB 'Hello, world!$' NhCAv+
i7(~>6@|
CODESEG ,S0UY):( A
MOV AX, @data Vq U|kv
MOV DS, AX *.3y2m,bZ
MOV DX, OFFSET HW 7O9n!aJ
MOV AH, 09H ;b|
INT 21H '{CWanTPi
MOV AX, 4C00H `{<JC{yc?
INT 21H qS|AdkNL
END E#aZvE
=R2l3-HA=
DU`v J2
x86 CPU,GNU/Linux,NASM 'QnW9EHLF
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). |e+aZ%g
;Enter this into "hello.asm" then type: Y!it!9
;"nasm -f elf hello.asm" Pr2;Kp
;"ld hello.o -o hello" +nzTxpcP@K
;"./hello" !%V*UR9
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section .data ;data section declaration T$IUKR
msg db 'Hello World!',0AH ~ttKI4
len equ $-msg ;string length DUhT>,~]
", QPb3
section .text ;code section declaration >HX)MwAP
global _start ;entry point (start of execution) 3AvcJ1
_start: mov edx,len ;string length fRFYJFc n
mov ecx,msg ;string start "5h_8k~sQ
mov ebx,1 ;file handle: stdout @ce3%`c_
mov eax,4 ;sys_write CZ2iJy
int 80h ;kernel system call
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mov ebx,0 ;return value E)Srj~$d
mov eax,1 ;sys_exit Z>&K&ttJ
int 80h ;kernel system call 97(n\Wt2
W%WC(/hor
{>A
8g({i
x86 CPU,Windows,MASM32 k5C>_(
A
.386 TGtyJ3x\
.model flat,stdcall ^7<[}u;qF
option casemap:none >R#9\/s
;Include 文件定义 ;!:F#gahv
include windows.inc )6g&v'dq
include user32.inc "d2LyQy
includelib user32.lib l)H9J]
include kernel32.inc g/6nwa
includelib kernel32.lib TRo4I{L6S
;数据段 [m
%W:Ez
.data @| P3
szCaption db 'A MessageBox!',0 P.!;Uf}32
szText db 'Hello,world!',0 [{?;c+[
;代码段 *n,UOHlO
.code m qpd
start: '/dTqg*W
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK ?N(u4atC
invoke ExitProcess,NULL \DaLHC~
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> {vjqy&?y
end start \3M1.Q4$Gr
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AWK V.U|OQouT
BEGIN { print "Hello, world!" } rrYp'L
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BASIC BJ"Ay@D*
传统版BASIC(例如GWBASIC): Na-q%ru
Up'."w_zE
10 PRINT "Hello, world!" V54q"kP,@.
20 END SK}HXG{?
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或在提示符输入: 7f[8ED[4
z(#=tC|
?"Hello, world!":END -}NAb^d
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现代版BASIC(例如Quick BASIC): Z5yt]-WN&
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Print "Hello, world!" k -io$
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以下的语句在Quick BASIC中同样有效: BSjbnnW}"
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? "Hello,world!" 7G?Ia%u
F>TYVxQ
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BCPL zz[g{[SN
GET "LIBHDR" gW/QFZjY
2Qw)-EB
LET START () BE #wGQv
$( \l>qY(gu
WRITES ("Hello, world!*N") %}\ vW
$) ]<Z&=0i# 9
-aC!0O y`
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Befunge ~>.awu+o|
"!dlrow olleH">v neK*jdaP
, ,o4r,.3[s
^_@ S$Qr@5
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_, 11EeW@
Brainfuck iZsau2K
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< #/\pUK~km
+++++++++++++++.>.+++.------.--------.>+.>. u!m,ilAnd
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C {K< ~
vj;
#include <stdio.h> Hf!9`R[
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int main(void) ;jp6 }zfI
{ R (t!xf
printf("Hello, world!\n"); yp( ?1
return 0; b/T20F{W\o
} XCKY
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C++ cr2{sGn|
#include <iostream> )i},@T8[
f_^ix
int main() !pG+Ak?
{ 2O}s*C$Xav
std::cout << "Hello, world!" << std::endl; v+|@}9| Z
return 0; |`N$>9qN
} ?v0A/68s#
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C++/CLI 2<p5_4"-U*
int main() FSI]k:
{ ^yzo!`)fso
System::Console::WriteLine("Hello, world!"); <