“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。 BB63xEx
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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》。 %&tb9_T)d
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以下是用不同语言写成的Hello World程序的几个例子: 2
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Ada Sl"BK0:%7
with Ada.Text_Io; use Ada.Text_Io; K^aj@2K{
procedure Hello is nS.2C>A
begin 9KyZEH;pY
Put_Line ("Hello, world!"); Ib6(Bp9.L
end Hello; d/]|657u
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汇编语言 a8zZgIV
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x86 CPU,DOS,TASM lufeieW
MODEL SMALL L<=) @7
IDEAL (UGol[f<
STACK 100H 'B`#:tX^N
c" +zgP
DATASEG f TO+ZTRqf
HW DB 'Hello, world!$' Tm_8<$ 7
;%Q&hwj
CODESEG bK4&=#Zh
MOV AX, @data x,\!DLq:p
MOV DS, AX R*bmu
MOV DX, OFFSET HW 4sIXO
MOV AH, 09H NI.`mc6Xd
INT 21H {fU?idY)c
MOV AX, 4C00H *T1~)z}j<
INT 21H y(}Eko4u5
END \2>?6zs
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x86 CPU,GNU/Linux,NASM I+",b4
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). VoM6
;Enter this into "hello.asm" then type: "r. .
;"nasm -f elf hello.asm" OJpj}R
;"ld hello.o -o hello" LG&5VxT=,<
;"./hello" |` "?
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section .data ;data section declaration 'M N1A;IJ
msg db 'Hello World!',0AH +/y]h0aa
len equ $-msg ;string length A=X-;N#
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section .text ;code section declaration $;`I,k$0>~
global _start ;entry point (start of execution) =X@o@1
_start: mov edx,len ;string length =|,A%ZGF$
mov ecx,msg ;string start =cn~BnowY
mov ebx,1 ;file handle: stdout ?Ht=[ l=
mov eax,4 ;sys_write \|t{e8}
int 80h ;kernel system call f4"4ZVcr
pj;
I)-d/
mov ebx,0 ;return value 6t7fa<
mov eax,1 ;sys_exit k ZxW"2
int 80h ;kernel system call k>5 O`Y:
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x86 CPU,Windows,MASM32 X#ZgS!Mn
.386 V!&P(YO:
.model flat,stdcall {/|qjkT&W
option casemap:none eFFc 9'o
;Include 文件定义 v{y{sA
include windows.inc J(s;$PG
include user32.inc {G*OR,HN
includelib user32.lib h1f8ktF
include kernel32.inc N4wA#\-
includelib kernel32.lib =~ jAoOC@
;数据段 wz=z?AZW
.data P1V1as
szCaption db 'A MessageBox!',0 ;#/0b{XFj
szText db 'Hello,world!',0 V LdB_r3lQ
;代码段 IzUo0D*@
.code &{z<kmc$6
start: *aRX \TnN
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK <
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invoke ExitProcess,NULL d#>y }H9
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> &z@~B&O
end start l r~gG3
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; LMWNy4
AWK Wi$dZOcSJ
BEGIN { print "Hello, world!" } FjFwvO_.
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BASIC x_!ZycEa
传统版BASIC(例如GWBASIC): z<&m*0WYA
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10 PRINT "Hello, world!" SlaDt
20 END X3B{8qx_>
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或在提示符输入: Ns=AjhLc z
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?"Hello, world!":END v>mn/a
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现代版BASIC(例如Quick BASIC): aE/D*.0NI
lddp^ #f
Print "Hello, world!" T3 pdx~66
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以下的语句在Quick BASIC中同样有效: Vmi{X b]<
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? "Hello,world!" YRcps0Dx9
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BCPL Uyx&E?SlEq
GET "LIBHDR" zp4W'8
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LET START () BE &.N$
$( r;m`9,RW
WRITES ("Hello, world!*N") p#@Z$gTH`'
$) O#_b7i
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Befunge \x+3f
"!dlrow olleH">v 2]WE({P
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C <@uOCRbV
#include <stdio.h> la^
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int main(void) #A<P6zJXR
{ 0q6I;$H
printf("Hello, world!\n"); Ee2c5C!|C
return 0; B'weok
} Of[;Qn
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C++ R,_d1^|*w
#include <iostream> Vpp&