“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。 AvW2)+6G
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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》。 oU }eAZj{
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以下是用不同语言写成的Hello World程序的几个例子: 4F_*,_Y
Ada /I[?TsXp
with Ada.Text_Io; use Ada.Text_Io; g\sW2qXEw
procedure Hello is 'FB?#C %U
begin 6=V&3|"
Put_Line ("Hello, world!"); FD?!bI4
end Hello; jJ^p
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汇编语言 S+c)
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x86 CPU,DOS,TASM J%|!KQl
MODEL SMALL 9 *>@s
IDEAL *E"QFirk0
STACK 100H
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DATASEG >)g`;iO
HW DB 'Hello, world!$' b$/TfpNdo
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CODESEG :f^=~#!
MOV AX, @data U\N|hw#f!!
MOV DS, AX ;XFo:?
MOV DX, OFFSET HW 4k9O6
MOV AH, 09H U1pL
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INT 21H o(~QuHOp8>
MOV AX, 4C00H r^3QDoy
INT 21H %'2DEt??
END p|mt2oDjw
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x86 CPU,GNU/Linux,NASM 0cV=>|b>;
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). gg;&a(
;Enter this into "hello.asm" then type: Rs@2Pe$3
;"nasm -f elf hello.asm" J7q]|9Hus|
;"ld hello.o -o hello" u&)+~X
;"./hello" "#uXpCuw
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section .data ;data section declaration 9|yn{4E
msg db 'Hello World!',0AH sjBP#_lW
len equ $-msg ;string length l7G&[\~
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section .text ;code section declaration x5q5<-#
global _start ;entry point (start of execution) L"Y_:l3"7
_start: mov edx,len ;string length Gc= #
mov ecx,msg ;string start ]^HlI4 z
mov ebx,1 ;file handle: stdout hL:n9G
mov eax,4 ;sys_write YJZViic
int 80h ;kernel system call IY$H M3t7
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mov ebx,0 ;return value B%HG7
mov eax,1 ;sys_exit K07b#`NF6
int 80h ;kernel system call JTu^p]os?
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x86 CPU,Windows,MASM32 aa!o::;
.386 0pP;[7k\
.model flat,stdcall _8$arjx=
option casemap:none }eA2y($N
;Include 文件定义 ~9.0:Fm<
include windows.inc HorFQ?8
include user32.inc 9F8"(
includelib user32.lib f?O?2g
include kernel32.inc NFT&\6!o
includelib kernel32.lib
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;数据段 \(9hg.E
.data _~ m@ SI
szCaption db 'A MessageBox!',0 #K1VPezN
szText db 'Hello,world!',0 v]CH
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;代码段 s{v!jZ
.code AH$D./a
start: 7TCY$RcF,I
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK T_}9b
invoke ExitProcess,NULL t!MGSB~
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> %u"3&kOV
end start {(r`&[
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BEGIN { print "Hello, world!" } -e H5s3:A
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BASIC (UWV#AR
传统版BASIC(例如GWBASIC): !Yx9=>R
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10 PRINT "Hello, world!" tHezS~t_
20 END M*|,05>
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或在提示符输入: '0z-duu
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?"Hello, world!":END Dh=?Hzw
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现代版BASIC(例如Quick BASIC): Bi7QYi/
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Print "Hello, world!" i
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以下的语句在Quick BASIC中同样有效: =<ngtN
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? "Hello,world!" 906b=
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GET "LIBHDR" APydZ
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LET START () BE .(T*mk*>
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WRITES ("Hello, world!*N") dQSX&.<c,
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Befunge 6CoDn(+z
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