“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。 oY)xXx
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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》。 =zaf{0c
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以下是用不同语言写成的Hello World程序的几个例子: vlW521
Ada (.r9bl
with Ada.Text_Io; use Ada.Text_Io; %0-fn'
procedure Hello is 'F-;uN
begin ,v^A;,q
Put_Line ("Hello, world!"); `4GEq2%
end Hello; QlxzWd3=q
(tG8HwV-
0<ze'FbV]
汇编语言 GhlbYa
;iB9\p$K)
x86 CPU,DOS,TASM hD)'bd
MODEL SMALL }.ZT?p\
IDEAL ?LxBH-o(
STACK 100H N+0[p@0
D^m`&asC
DATASEG ,1|Qm8O
HW DB 'Hello, world!$' *P:!lO\|
m/E$0tf
CODESEG [:Upn)9
MOV AX, @data ?**9hu\BG
MOV DS, AX ,_wpYTl*X
MOV DX, OFFSET HW s:O8d L
/
MOV AH, 09H #aHJ|[[(n
INT 21H I-glf?F)
MOV AX, 4C00H b7uxCH]Z
INT 21H o&U'zaj
END UR{OrNg*
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4lp90sa
x86 CPU,GNU/Linux,NASM -f&m4J} E
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). r*F^8_YMK
;Enter this into "hello.asm" then type: Ia@!Nr2
;"nasm -f elf hello.asm" &mPR[{
;"ld hello.o -o hello" ~DL-@*&
;"./hello" XI5TVxo(q
, tEd>
section .data ;data section declaration 7QXp\<7
msg db 'Hello World!',0AH Zws[C
len equ $-msg ;string length IE*5p6IM~
;t xW\iy%Z
section .text ;code section declaration SuJa?VU1w
global _start ;entry point (start of execution) ~@H9h<T
_start: mov edx,len ;string length oF(=@UL
mov ecx,msg ;string start _xz>O[unf
mov ebx,1 ;file handle: stdout 1m{c8Z.h/d
mov eax,4 ;sys_write "KHe6otmi_
int 80h ;kernel system call /EvnwYQy
UCBx?9O/0
mov ebx,0 ;return value vEZd;40y
mov eax,1 ;sys_exit b/]@G05>>
int 80h ;kernel system call S=zW
wo$
M> rertUR
3?x}48
x86 CPU,Windows,MASM32 {P7 I<^,
.386 Z,QSbw@,7
.model flat,stdcall B*;PF
option casemap:none Aq*,cOF+
;Include 文件定义 E]&tgZO
include windows.inc 5T-CAkR{n
include user32.inc pKzrdw-!
includelib user32.lib C'&t@@:
include kernel32.inc 1\LK[tvh
includelib kernel32.lib Y-
tK
;数据段 Y{`hRz`
.data =rzhaU'A'
szCaption db 'A MessageBox!',0 a
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szText db 'Hello,world!',0 R-]i BL
;代码段 j\%m6\{n|
.code Sd?+j;/"
start: r34 GO1d
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK Q3 9;bz
invoke ExitProcess,NULL 3IYbgUG
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> lfe^_`ij(+
end start m'"Ra-
yoVN|5
ibxtrt=
AWK )A*Sl2ew
BEGIN { print "Hello, world!" } an`
GY&
kT,2eel
-FW'i10\2+
BASIC Jo9!:2?
传统版BASIC(例如GWBASIC): mP+rPDGp
tOVYA\]
10 PRINT "Hello, world!" #M=d)}[
20 END }<
m@82\
z!
DD'8r>
或在提示符输入: P#x]3j]
F/chE c
V
?"Hello, world!":END OJ4-p&1
c[E>2P2-_
现代版BASIC(例如Quick BASIC): !Z`xwk"!
7).zed^
Print "Hello, world!" VsR`y]"g
cwKOE?!
以下的语句在Quick BASIC中同样有效: 'P,F)*kh
_.ELN/$-
? "Hello,world!" #zv'N
WA 79(B
!Knv/:+
BCPL `@r#o&
GET "LIBHDR" `<kV)d%xEF
*|Fl&`2
LET START () BE k.CHMl]
$( $N`uM
WRITES ("Hello, world!*N") rXR}]|;>
$) M"$TXXe
.`Ts'0vVy
C},$(2>0+
Befunge hhvP*a_J
"!dlrow olleH">v vXi}B
, &5u[q
^_@ JI}p{yI
*>XY' -;2e
K\GIh8L
Brainfuck lt&30nf=
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< AFcA5:ja
+++++++++++++++.>.+++.------.--------.>+.>. 1yIo'i1
umWZ]8
6@HY+RCx
C |fk,&5s
#include <stdio.h> v1j]&3O
2)^[SpZ
int main(void) m'%Z53&
{ ~Zd n#z\
printf("Hello, world!\n"); 7TQh'j
return 0; IJn r^S8
} |KFWW
Pk; 9\0k7
h;KI2k_^
C++ uhLg2G^h
#include <iostream> ]&ptld;
Ye}y_W
int main() 0OMyE9jJJ
{ u0J+Nj9
std::cout << "Hello, world!" << std::endl; ^IGTGY]s
return 0; >P=xzg79
} wz!]]EQ!o
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7}r!%<^
C++/CLI #1zWzt|DW
int main() ':!;6v|L
{ b['TRYc=:
System::Console::WriteLine("Hello, world!"); <