“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。 OmkJP
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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》。 ] 7[#K^
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以下是用不同语言写成的Hello World程序的几个例子: e}-fGtFx
Ada Py#EjF12
with Ada.Text_Io; use Ada.Text_Io; ewT
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procedure Hello is z9&j
begin )2wf D
Put_Line ("Hello, world!"); y|+5R5}K
end Hello; pRh9+1EM;
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汇编语言 WI| -pzg
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x86 CPU,DOS,TASM h}'Hst
MODEL SMALL Rs{8vV
IDEAL <uBRLe`)
STACK 100H @D*PO-s9
F (kq
DATASEG R}w}G6"\
HW DB 'Hello, world!$' Y|b,pC|,
KF(y`(8f
CODESEG 'Q=)-
MOV AX, @data <K&A/Ue
MOV DS, AX bh5P98s
MOV DX, OFFSET HW !oXFDC3k
MOV AH, 09H -1B. A
INT 21H OO?N)IB@
MOV AX, 4C00H f*"T]AX0
INT 21H nu+^D$ait
END dHiir&Rd9`
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x86 CPU,GNU/Linux,NASM Qp[
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;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). (x/:j*`K
;Enter this into "hello.asm" then type: un!v1g9O
;"nasm -f elf hello.asm" A{-S )Z3}
;"ld hello.o -o hello" U!Zj%H1XQ0
;"./hello" S?`0,F
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section .data ;data section declaration {*n<A{$[
m
msg db 'Hello World!',0AH 4qE4 i:b
len equ $-msg ;string length MC,Qv9m
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section .text ;code section declaration &0[L2x}7
global _start ;entry point (start of execution) '?m2|9~
_start: mov edx,len ;string length Q_fgpjEh/t
mov ecx,msg ;string start S-\wX.`R1
mov ebx,1 ;file handle: stdout 6~ y'
mov eax,4 ;sys_write vOCaru?~h
int 80h ;kernel system call .H M3s
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mov ebx,0 ;return value ]D5Maid+
mov eax,1 ;sys_exit '3^ qW
int 80h ;kernel system call 2/t; }pw8
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x86 CPU,Windows,MASM32 S}h
d, "I
.386 s}Go")p<:
.model flat,stdcall t>%b[(a
option casemap:none _~CJitR3
;Include 文件定义 ):tv V
include windows.inc ?-Of\fNu
include user32.inc )S4ga
includelib user32.lib BcpbS%S
include kernel32.inc \VIY[6sn\M
includelib kernel32.lib &@{`{
;数据段 sl$y&C-
.data IMdp"
szCaption db 'A MessageBox!',0 %nq<nfDT
szText db 'Hello,world!',0 A_ &IK;-go
;代码段 (JdheCq!x
.code $1d{R;b[
start: FdnLxw
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK !.V_?aYi8
invoke ExitProcess,NULL hmLI9TUe6
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> "8zMe L
end start Z|UVH
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AWK 3"0QW4A
BEGIN { print "Hello, world!" } a(O@E%|u
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BASIC # Dgkl
传统版BASIC(例如GWBASIC): rttKj{7E
&``nD
10 PRINT "Hello, world!" $X.F=Kv
20 END DtGkhq;
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或在提示符输入: }2BNy9q@
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?"Hello, world!":END zn= pm#L
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现代版BASIC(例如Quick BASIC): ]!P6Z?
Bw`? zd\*
Print "Hello, world!" @g#| srYD
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以下的语句在Quick BASIC中同样有效: f]Aa$\@b
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? "Hello,world!" k"BM1-f
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$ <[r3
BCPL u|ihUE!h
GET "LIBHDR" UDcr5u eKn
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LET START () BE L=!h`k
$( at*DYZBjDB
WRITES ("Hello, world!*N") {ByKTx&
$) #X!seQ7a
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<R2SV=]Sq#
Befunge BUh(pS:
"!dlrow olleH">v {}"
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