“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。 7<K=G2_:
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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》。 ~E vGNnTL
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以下是用不同语言写成的Hello World程序的几个例子: 0bSnD|#I
Ada M!%|IKw
with Ada.Text_Io; use Ada.Text_Io; C0>L<*C
procedure Hello is -[h|*G.J
begin 0< }BSv
Put_Line ("Hello, world!"); S/l6c P
end Hello; fhC| =0XB
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汇编语言 Ht]O:io`
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x86 CPU,DOS,TASM g+(Y)9h&
MODEL SMALL F%O+w;J4
IDEAL "{2niBx
STACK 100H \6aisK
wLvM<p7OX
DATASEG M~+DxnJ=
HW DB 'Hello, world!$' sk3AwG;A
d b*J
CODESEG JBLh4c3
MOV AX, @data Z.s0ddMs
MOV DS, AX EW+QVu@
MOV DX, OFFSET HW A8:eA
MOV AH, 09H .S4%Q9l
INT 21H ySF^^X$J
MOV AX, 4C00H o,@(]e~
INT 21H J=HN~B1
END )l`VE_(|
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x86 CPU,GNU/Linux,NASM I8YCXh
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). s%RG_"l
;Enter this into "hello.asm" then type: Ynp#3 r
;"nasm -f elf hello.asm" U\-R'Z>M
;"ld hello.o -o hello" ViG>gMG v
;"./hello" agQDd8 oX
JU)k+:\a
section .data ;data section declaration I~;H'7|e
msg db 'Hello World!',0AH Ka<J*
k3
len equ $-msg ;string length *.Z~f"SZy*
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section .text ;code section declaration g${k8.TV
global _start ;entry point (start of execution) bfy=
_start: mov edx,len ;string length Jb-.x_Bf
mov ecx,msg ;string start ^`Hb7A(
mov ebx,1 ;file handle: stdout Z#YNL-x
mov eax,4 ;sys_write 3Vak
C
int 80h ;kernel system call EBr?>hl
xV=Tmu6l
mov ebx,0 ;return value 7:<A_OLi
mov eax,1 ;sys_exit .N`*jT
int 80h ;kernel system call {w7/M]m-
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x86 CPU,Windows,MASM32 'g3T'2"`5
.386 g!9|1z
.model flat,stdcall C2\zbC[qm
option casemap:none dP`B9>r
;Include 文件定义 W!Fc60>p@f
include windows.inc ia_lP
include user32.inc i83[':
includelib user32.lib bvZ:5M
include kernel32.inc HxcL3Bh$~}
includelib kernel32.lib ,]]*}4[r
;数据段 dC|6z/
.data q alrG2
szCaption db 'A MessageBox!',0 0%4OmLBT
szText db 'Hello,world!',0 OmS8cSYGc
;代码段 Hmnxmgx
.code z,4 D'F&
start: #<EYO
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK *[|+5LVn
invoke ExitProcess,NULL "/mtuU3rt
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> b4WH37,lA
end start 9y<h.T
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AWK >P&1or)e%
BEGIN { print "Hello, world!" } P.QF9%
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BASIC +jyGRSo
传统版BASIC(例如GWBASIC): YRFz]
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10 PRINT "Hello, world!" l;L_A@B<
20 END a@d 15CN
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或在提示符输入: i7e6l C
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?"Hello, world!":END "WUS?Q
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现代版BASIC(例如Quick BASIC): %dv?n#Uf
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Print "Hello, world!" J9p4\=9
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以下的语句在Quick BASIC中同样有效: XWyP'\
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? "Hello,world!" _#s,$K#
mbGma
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BCPL UL{J%Ze=~
GET "LIBHDR" ,^97Ks
;
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GY'0
LET START () BE 9|#cjHf
$( ,<r&]
eC
WRITES ("Hello, world!*N") 5UO+c(T
$) nGkSS_X
a4=(z72xe
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Befunge uMS+,dXy
"!dlrow olleH">v ?!6Itkg
, O6R)>Y4
^_@ |#kY_d)10
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Brainfuck EN2SI+
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< k[;)/LfhS
+++++++++++++++.>.+++.------.--------.>+.>. Y}N\|*ye-
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C f7lj,GAZ
#include <stdio.h> L ,dh$F
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int main(void) 4JAz{aw'b
{ |JxVfX8^
printf("Hello, world!\n"); V0>X2&.A
return 0; *;Mi/^pzK
} 'Oue 1[
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C++ <m]0!ii
#include <iostream> K)7T]z`
ctZ,qg*N
int main() d+D~NA[M
{ ,X4+i8Yc
std::cout << "Hello, world!" << std::endl; si]VM_w6
return 0; 3' i6<
} i[!|0U`p
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C++/CLI 4,I,f>V
int main() Hd|[>4 Z
{ -G~]e6:zD
System::Console::WriteLine("Hello, world!"); ny5P*yWEh
} S4x9k{Xn
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C# (C Sharp) ws'e
class HelloWorldApp gjDNl/r/
{ ]y_:+SHc
public static void Main() !p&<.H_
{ )@NFV*@I
System.Console.WriteLine("Hello, world!"); nqj(V
} !9;m~T7.
} r&]XNq'P9
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COBOL <fvu)
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IDENTIFICATION DIVISION. L 4j#0I]lq
PROGRAM-ID. HELLO-WORLD. 1<r!9x9G
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ENVIRONMENT DIVISION. XV]N}~h o`
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DATA DIVISION. >3!~U.AA'x
nn7LL+h
PROCEDURE DIVISION. wQ+pVu?6_
DISPLAY "Hello, world!". lVvcrU
STOP RUN. s2O()u-
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q/EX`%U
Common Lisp MB)<@.A0
(format t "Hello world!~%") 9O;Sn +
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DOS批处理 IuXgxR%
@echo off 1&bo