“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。 Kf05<J!
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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》。 *=$[}!YG
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以下是用不同语言写成的Hello World程序的几个例子: *Nvy+V
Ada k_*XJ <S!Y
with Ada.Text_Io; use Ada.Text_Io; VO.-.
procedure Hello is Ynv9&P
begin lFiq<3Nk
Put_Line ("Hello, world!"); 'GV&]
end Hello; ER~T'-YMS
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汇编语言 x1 ;rb8
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x86 CPU,DOS,TASM gB/;clCdX)
MODEL SMALL }yx=(+jP
IDEAL /e.FY9
STACK 100H Fa sI'Ulk
U;';"9C2>
DATASEG `"xk,fVYd
HW DB 'Hello, world!$' \3t,|%v
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CODESEG =w',-+@
MOV AX, @data I;Al?&uw
MOV DS, AX \yih 1Om>~
MOV DX, OFFSET HW U9<_6Bsd
MOV AH, 09H _-@ZOhw&
INT 21H *C4~}4WT\
MOV AX, 4C00H q?;N7P
INT 21H %'{V%IXQ
END -!XrwQyk
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x86 CPU,GNU/Linux,NASM u{g]gA8s
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). ?JuX~{{.L
;Enter this into "hello.asm" then type: 8s QQK.N(
;"nasm -f elf hello.asm" **T:eI+
;"ld hello.o -o hello" /QrA8
;"./hello" 'fS?xDs-v
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section .data ;data section declaration 'is,^q:@
msg db 'Hello World!',0AH J*}VV9H
len equ $-msg ;string length i'Y-V]->
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section .text ;code section declaration T1lXYhAWS
global _start ;entry point (start of execution) ISpeV
_start: mov edx,len ;string length i'M^ez)u
mov ecx,msg ;string start !?BW_vY
mov ebx,1 ;file handle: stdout `[X6#`<
mov eax,4 ;sys_write 8'3"uv
int 80h ;kernel system call bHO7*E
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mov ebx,0 ;return value _TZW|Dh-2F
mov eax,1 ;sys_exit AiY|O S3R
int 80h ;kernel system call Vn)%C_-]A
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D4AEZgC F,
x86 CPU,Windows,MASM32 IgLVn<5n
.386 nped
.model flat,stdcall lN);~|IOv7
option casemap:none ?$<SCN=
;Include 文件定义 d-hbvLn
include windows.inc XXXljh6
include user32.inc j'k8^*M6
includelib user32.lib L5R `w&Up
include kernel32.inc f8^"E $"
includelib kernel32.lib (})]H:W7
;数据段 dj3|f{kg{
.data &K06}[J
szCaption db 'A MessageBox!',0 +*n]tlk
szText db 'Hello,world!',0 USE [N
;代码段 ah 4kA LO
.code *]FgfttES
start: 'n>K^rA
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK $X`bm*
invoke ExitProcess,NULL Mg#`t$u
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> U%Dit
end start {*sGhGwr
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AWK lrCm9Oy
BEGIN { print "Hello, world!" } (gLea
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BASIC *f{7
传统版BASIC(例如GWBASIC): v,n);
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10 PRINT "Hello, world!" 1d`cTaQ-
20 END Ny[QT*nV
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或在提示符输入: bi+9R-=&
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?"Hello, world!":END ,cLH*@
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现代版BASIC(例如Quick BASIC): 9`&?hi49nK
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Print "Hello, world!" 0%/,>IR>r
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以下的语句在Quick BASIC中同样有效: iA]DE`S
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? "Hello,world!" ^Fn%K].X
{ AFf:[G
'Cg V0&@
BCPL V>6QPA^
GET "LIBHDR" B<Ol+)@,}
dQ,Q+ON>
LET START () BE CdZnD#F2
$( 1y7y0V
WRITES ("Hello, world!*N") Qy/uB$q{A
$) #kj~G]QA
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U4=]#=R~o
Befunge ]7*kWc2
"!dlrow olleH">v V5~fMsse
, ^s=*J=k
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