“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。 oPc\<$
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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》。 C6_@\&OA
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以下是用不同语言写成的Hello World程序的几个例子: N)% ;jh:T
Ada 3\;27&~gV
with Ada.Text_Io; use Ada.Text_Io; W(fr<<hL
procedure Hello is l8K5k:XCU3
begin p1c3Q$>i
Put_Line ("Hello, world!"); >MJ?g-
end Hello; KNgH|5Pb
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汇编语言 \8OO)98'
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x86 CPU,DOS,TASM ]aCk_*U
MODEL SMALL ~tB;@e
IDEAL .ut{,(5
STACK 100H t0:AScZY
7 1W5.!
DATASEG Fyyg`J
HW DB 'Hello, world!$' {5*|C-WWtG
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CODESEG 0^'B3$>
MOV AX, @data 0i[zup
MOV DS, AX R6 XuA(5
MOV DX, OFFSET HW =rPrPb
MOV AH, 09H Kt>X[o3m,
INT 21H @&1Wyp
MOV AX, 4C00H 6pE :A@
INT 21H ^0W(hA
END 52zGJ I*
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x86 CPU,GNU/Linux,NASM +5v}q.:+
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). PZ8U6K'
;Enter this into "hello.asm" then type: xr(|*
;"nasm -f elf hello.asm" hM@\RPsY
;"ld hello.o -o hello" k&hc m
;"./hello" 2Ha5yaTL
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section .data ;data section declaration iV.p5FD
msg db 'Hello World!',0AH .'[/|4H
len equ $-msg ;string length ,G^[o,hS
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section .text ;code section declaration Hg}I]!B
global _start ;entry point (start of execution) +w|9x.&W
_start: mov edx,len ;string length z41_oG7
mov ecx,msg ;string start 4"\yf
mov ebx,1 ;file handle: stdout VVWM9x
mov eax,4 ;sys_write q&'Lbxc>c
int 80h ;kernel system call /.5;in
gM;}#>6
mov ebx,0 ;return value XM
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mov eax,1 ;sys_exit [AEBF2OIv
int 80h ;kernel system call Jeqxspn
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x86 CPU,Windows,MASM32 sPNfbCOz
.386 47 u@4"M
.model flat,stdcall E(<LvMiCa
option casemap:none +V v+K(lh$
;Include 文件定义 z*~YLT&
include windows.inc $7I]`Jt
include user32.inc _8K%`6!"Z
includelib user32.lib 9Z\z96O-
include kernel32.inc kR.wOJ7'
includelib kernel32.lib *.y' (tj[
;数据段 aI#4H+/
.data ApPy]IdwX
szCaption db 'A MessageBox!',0 go)p%}s
szText db 'Hello,world!',0 U6 82Th
;代码段 hQJWKAf,/
.code a!Yb1[
start: nN`"z3o
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK AZFWuPJo
invoke ExitProcess,NULL |U[y_Y\a
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> #_Ea[q7v
end start r
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BEGIN { print "Hello, world!" } FN"rZWM
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BASIC UPCQs",
传统版BASIC(例如GWBASIC): coQ[@vu
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10 PRINT "Hello, world!" DM7}&~
20 END 1JTbCS
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或在提示符输入: 4sY[az
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?"Hello, world!":END p?rK`$U+J
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现代版BASIC(例如Quick BASIC): H$!-f>Rxa
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Print "Hello, world!" FuP}Kec
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以下的语句在Quick BASIC中同样有效: jOv"<
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? "Hello,world!" l[n@/%2
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BCPL 9$tl00
GET "LIBHDR" N2~$rpU3
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LET START () BE :zL 393(
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WRITES ("Hello, world!*N") j8HOc(
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Befunge nTZ> |R)
"!dlrow olleH">v S!j^|!
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^_@ J9@}DB
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Brainfuck huAyjo
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< \y*j4 0
+++++++++++++++.>.+++.------.--------.>+.>. vj3isI4lU
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C F!CAitxd
#include <stdio.h> Dr'sIH^
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int main(void) S[U/qO)m
{ N#Ag'i4HF
printf("Hello, world!\n"); GoeIjuELR
return 0; k}BDA|\s
} ]bfqcmh<
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C++ :ej_D}
#include <iostream> :VFTVmr
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int main() t{ H1u
{ G^KC&
std::cout << "Hello, world!" << std::endl; !QTPWA
return 0; 9r8D*PvS
} *:#Z+7x
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C++/CLI c(:Oyba
int main() b Fn(w:1Q
{ CgoXZX
System::Console::WriteLine("Hello, world!"); E!dp~RwZu
} ^N{X "
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C# (C Sharp) EP0a1.C
class HelloWorldApp 0x4l5x$8
{ bZXlJa`'S
public static void Main() p|s2G~0<
{ f\=6I3z
System.Console.WriteLine("Hello, world!"); h/9Sg*k
} .)0gz!Z
} }JGq 1
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COBOL ]]3Q*bq4
IDENTIFICATION DIVISION. p`LL
PROGRAM-ID. HELLO-WORLD. ;Lqm#]C
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ENVIRONMENT DIVISION. )Kr(Y.w
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DATA DIVISION. 0O^U{#*$I
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PROCEDURE DIVISION. ?qIGQ/af&
DISPLAY "Hello, world!". H<{*ub4'L*
STOP RUN. @@; 1%z
S~} +ypV
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Common Lisp qWkx:-g]
(format t "Hello world!~%") Mi;Tn;3er
:g/{(#E@Z
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DOS批处理 2t.fD@
@echo off
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echo "Hello, world!" 5%#i79z&B
+
p'\(Z(
@}Pw0vC
Eiffel %"{?[!C ?
class HELLO_WORLD ?9CIWpGjU
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creation [!5l0{0
make 3 k`NNA
feature Us*Vn
make is DU(X,hDBF
local Scf.4~H 0
io:BASIC_IO &