“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。 \`r5tQ r
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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》。 +L*2 6ar6
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以下是用不同语言写成的Hello World程序的几个例子: =-{+y(<"r
Ada GAbX.9[V
with Ada.Text_Io; use Ada.Text_Io; v')Fq[H
procedure Hello is t#oY|G3O}
begin `!5ZF@Q>e
Put_Line ("Hello, world!"); Yd lXMddE
end Hello; {Q^P<
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汇编语言 lu_ y 9o^
D0=D8P}H:
x86 CPU,DOS,TASM =jip* E^
MODEL SMALL ,JRYG<O_T
IDEAL -]\%a=]
STACK 100H URmx8=q
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DATASEG X!,P] G
HW DB 'Hello, world!$' 0U ?1Yh7
m
mkTf}[O
CODESEG |4pE"6A
MOV AX, @data (w?@qs!
MOV DS, AX ^~|P[}
MOV DX, OFFSET HW _;$VH4(BI
MOV AH, 09H 'Wl))lB
INT 21H &fq-U5zH
MOV AX, 4C00H Skl1%`
INT 21H '@RlKMnN
END / O6n[qj|
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x86 CPU,GNU/Linux,NASM ;%odN
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;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). 3zY"9KUN
;Enter this into "hello.asm" then type: ?s #DD,
;"nasm -f elf hello.asm" "P.7FD
;"ld hello.o -o hello" VR2BdfKU,
;"./hello" ,\4@Ao
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section .data ;data section declaration pNr3u
msg db 'Hello World!',0AH I5>HB;Q
len equ $-msg ;string length W}+Q!T=
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section .text ;code section declaration &6FRw0GX
global _start ;entry point (start of execution) a*6x^R;)
_start: mov edx,len ;string length +Vt@~Z4K
mov ecx,msg ;string start O*rKV2\
mov ebx,1 ;file handle: stdout rPkV=9ull,
mov eax,4 ;sys_write bV|:MW<Wv
int 80h ;kernel system call <_8\}!
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mov ebx,0 ;return value YN9ug3O+
mov eax,1 ;sys_exit FVT_%"%C9
int 80h ;kernel system call Wk$[;>NU3
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x86 CPU,Windows,MASM32 qbu Lcy3
.386 #* j
.model flat,stdcall cG6Q$
option casemap:none h"Yi'
;Include 文件定义 DY^q_+[V
include windows.inc ypwVzCUG
include user32.inc Duj9PV`2
includelib user32.lib 8fTuae$^
include kernel32.inc Yq4_ss'nB
includelib kernel32.lib kM*f9x
;数据段 l~AmHw
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.data ,*?bET
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szCaption db 'A MessageBox!',0 k]`I3>/L
szText db 'Hello,world!',0 Sb> ;k(;`:
;代码段 LR]P?
.code /@lXQM9T
start: GfD!Z3
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK pY!@w0.
invoke ExitProcess,NULL 0^*4LM|z
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> &!2
4l=!
end start YMj
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BEGIN { print "Hello, world!" } ;VeC(^-eh6
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BASIC ^F5[2<O/!
传统版BASIC(例如GWBASIC): aRdk^|}
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10 PRINT "Hello, world!" U
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20 END )i0\U
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或在提示符输入: WM*[+8h
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?"Hello, world!":END c>:}~.~T
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现代版BASIC(例如Quick BASIC): h35x'`g7+r
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Print "Hello, world!" B<xBuW
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以下的语句在Quick BASIC中同样有效: fBR,Oneo
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? "Hello,world!" lJpD>\$}@R
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z^gf@r
BCPL &=nwb4
GET "LIBHDR" Uxn_nh
~4.Tq{
LET START () BE <QQgOaS`2
$( ea3AcT6
WRITES ("Hello, world!*N") Z+' 7c|a
$) BR8z%R
.<gAa"
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Befunge ':R)i.TS
"!dlrow olleH">v iSUn}%YFz!
, _=3H!b =
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Brainfuck 6P;IKOv^
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< wWko9h=|mQ
+++++++++++++++.>.+++.------.--------.>+.>. 3cBuqQ
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C l"*qj#FD
#include <stdio.h> ;VSHXU'H
z|=l^u6uS
int main(void) z
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{ dz5a! e
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printf("Hello, world!\n"); "S(m1L?
return 0; &"BmCDOq
} ?=dyU(
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