“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。 b;~EJ
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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》。 TGt1d
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以下是用不同语言写成的Hello World程序的几个例子: -G^t-I
Ada L(!!7B_,
with Ada.Text_Io; use Ada.Text_Io; NdXy%Q
procedure Hello is kp<}
begin yEw"8u'
Put_Line ("Hello, world!"); X'3`Q S:!
end Hello; J*6n6
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汇编语言 B1i!te}*
C.9eXa1wkT
x86 CPU,DOS,TASM )T$fk
MODEL SMALL M#8Ao4
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IDEAL X~Rk ,d3
STACK 100H !=q:>}g
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DATASEG ;&t1FH#=
HW DB 'Hello, world!$' _]PfeCn:j
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CODESEG @e?[oojrM
MOV AX, @data Oa_o"p<Lr
MOV DS, AX -<}>YtB
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MOV DX, OFFSET HW G+QNg.pH
MOV AH, 09H CrwcYzrRWl
INT 21H ]`i@~Z h\
MOV AX, 4C00H 2'UFHiK
INT 21H n\8[G[M
END @qr3v>3X<
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x86 CPU,GNU/Linux,NASM ,j(p}t
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). luxKgcU
;Enter this into "hello.asm" then type: &L~31Ayj&
;"nasm -f elf hello.asm" )(|0KarF
;"ld hello.o -o hello" /NN[gz
;"./hello" ,h(f\h(9
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section .data ;data section declaration #3:'lGBIK
msg db 'Hello World!',0AH 39a]B`y
len equ $-msg ;string length ptc H>wM!
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section .text ;code section declaration C4SD
global _start ;entry point (start of execution) :+dWJNY:
_start: mov edx,len ;string length HV.|Eh_7
mov ecx,msg ;string start 52C-D+zCJ
mov ebx,1 ;file handle: stdout x#e\H
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mov eax,4 ;sys_write rEpKX
int 80h ;kernel system call \qd)l
pi l*/&pB
mov ebx,0 ;return value h
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mov eax,1 ;sys_exit B|
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int 80h ;kernel system call j C1^>D
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x86 CPU,Windows,MASM32 &+w!'LSaD
.386 1r:fxZO\Vd
.model flat,stdcall 4uAb
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option casemap:none m$y$wo<K[7
;Include 文件定义 !L.z4n,n+
include windows.inc Y*X6lo
include user32.inc ht
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includelib user32.lib F]&J%i
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include kernel32.inc b>AAx$2Y
includelib kernel32.lib <~8f0+"
;数据段 PG~m-W+
.data {arjW3~M:
szCaption db 'A MessageBox!',0 fdEj#Ux<H
szText db 'Hello,world!',0 %?G.lej,x
;代码段 K|J#/
.code @j8L{FGnN
start: &7kSLat+9{
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK sbiDnRf
invoke ExitProcess,NULL rJ~(Xu>,s
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> Fe2-;o
end start d?qO`-
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AWK P9cI{RI
BEGIN { print "Hello, world!" } z^GGJu%vjr
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BASIC $bC!T
传统版BASIC(例如GWBASIC): zm S-s\$,
:7;Iy u
10 PRINT "Hello, world!" j9fL0$+FI
20 END 3eDx@8N
}
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或在提示符输入: /n}V7
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?"Hello, world!":END $gtT5{"PN(
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现代版BASIC(例如Quick BASIC): "dU#j,B2
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Print "Hello, world!" c+M@{EbuN
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以下的语句在Quick BASIC中同样有效: z+B
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? "Hello,world!" ^?VT y5yp
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r
BCPL w`Aw+[24
GET "LIBHDR" w8@|b}
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LET START () BE 30v1VLR_)
$( b,V=B{(~
WRITES ("Hello, world!*N") oDDH;Q"M(
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Befunge F(n))`(
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Brainfuck PbH]K$mj{"
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C -~aEqj#?
#include <stdio.h> juZ3""
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int main(void) `d;izQ1_=
{ ,Yt&PE
printf("Hello, world!\n"); *Bz&