“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。 lqD.epm
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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》。 2'R;z<_
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以下是用不同语言写成的Hello World程序的几个例子: Gk"o/]Sf
Ada jg2UX
with Ada.Text_Io; use Ada.Text_Io; %BdQ.\4DS
procedure Hello is R^_7B(
begin Cxn<#Kf\-<
Put_Line ("Hello, world!"); n^} -k'l
end Hello;
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qG=?+em
汇编语言 U<T.o0s=
i}fAjS:W
x86 CPU,DOS,TASM .9":Ljs(L
MODEL SMALL (#|CL/ &
IDEAL HIK"Ce
STACK 100H Y|'0bujr
D'{NEk@
DATASEG J[Ckz]
HW DB 'Hello, world!$' GM1z@i\5
&E{CQ#k
CODESEG z%lu%
MOV AX, @data P}YtT3.K
MOV DS, AX dA)JR"r2
MOV DX, OFFSET HW c"nowbf
MOV AH, 09H 4rcNBmA,
INT 21H 5y
9(<}z
MOV AX, 4C00H 4trP*u,4
INT 21H D=B$ Pv9%
END gD13(G98
F&tU^(7<
&.m.ruab
x86 CPU,GNU/Linux,NASM IE)$.%q;)
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). -qI8zs$:5
;Enter this into "hello.asm" then type: n!Dr:$
;"nasm -f elf hello.asm" d4#CZv[g/
;"ld hello.o -o hello" n@TK}?\UoR
;"./hello" p`dH4y]D
3"*tP+H
section .data ;data section declaration |S0w>VH>
msg db 'Hello World!',0AH _u[2R=h
len equ $-msg ;string length lx'^vK% F
&["s/!O1 R
section .text ;code section declaration s6U$]9 `
global _start ;entry point (start of execution) xj ?#]GR
_start: mov edx,len ;string length #Nv^F
mov ecx,msg ;string start L:.z
FW,
mov ebx,1 ;file handle: stdout qG6?k}\\
mov eax,4 ;sys_write Q.U
wtH
int 80h ;kernel system call Q[vQT?J7
~nVO%IxM4J
mov ebx,0 ;return value B~CdY}UTsj
mov eax,1 ;sys_exit rexNsKRK_
int 80h ;kernel system call g3Xa b
#JAy
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x86 CPU,Windows,MASM32 rWP
-Rm
.386 H@'f=Y*D
.model flat,stdcall wv7XhY}
option casemap:none X([8TR
;Include 文件定义 q:/3uC7
include windows.inc W5^<4Ya!
include user32.inc }eK.\_t=
includelib user32.lib 6Mj(B*c
include kernel32.inc FK+`K<
includelib kernel32.lib tR Cz[M&
;数据段 4G_At
.data 9 WO|g[Y3
szCaption db 'A MessageBox!',0 ,\RZ+kC>~
szText db 'Hello,world!',0 k9_c<TSzu
;代码段 ED;rp9(
.code cuoZ:Wh
start: ;{Nc9d
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK ^2a 63_
invoke ExitProcess,NULL 1=Z, #r
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> P#l"`C
/
end start T^DJ/uhd
\0fk^
J=t@2
AWK ,<t)aZL,A;
BEGIN { print "Hello, world!" } >3?p 23|;
iF*L-
EXEB A&*
BASIC v+vM:At4
传统版BASIC(例如GWBASIC): a{@gzB
H7{I[>:
10 PRINT "Hello, world!" ~zYk,;m
20 END oe*CZ
?`/DFI'_G
或在提示符输入: z(n Ba]^[F
VC X^D)[-
?"Hello, world!":END f;=<$Y>i
"O/
6SV
现代版BASIC(例如Quick BASIC): Q*ixg$>
(H6Mi.uZ
Print "Hello, world!" b!JrdJO,DP
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以下的语句在Quick BASIC中同样有效: J3XrlSc
KA? J:
? "Hello,world!" hjq@.5
Yy'CBIq#f
`t#9
yN
BCPL 9/JBn
GET "LIBHDR" 7d^ ~.F
b ;>?m
LET START () BE im@QJ:
$( FGzn|I
WRITES ("Hello, world!*N") k] A(nr
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