“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。 + 6x"trC
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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》。 JiKImz
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以下是用不同语言写成的Hello World程序的几个例子: ?~F]@2)5w
Ada 2"T8^r|U
with Ada.Text_Io; use Ada.Text_Io; 98D{{j92
procedure Hello is X?KGb{
begin Y
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Put_Line ("Hello, world!"); 2B6^]pSk
end Hello; EG F:xl
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汇编语言 1k!D0f3qb
h=X7,2/<
x86 CPU,DOS,TASM 5T!&r
MODEL SMALL -6uH.
IDEAL 1t0bUf;(M
STACK 100H i{<8
hLO
! a86iHU
DATASEG =L:[cIRrT;
HW DB 'Hello, world!$' <2n'}&F
Wl,%&H2S<
CODESEG I'x$,s
MOV AX, @data Q<z)q<e
MOV DS, AX *
zd.
MOV DX, OFFSET HW a^@+%?X
MOV AH, 09H r`?&m3IOP
INT 21H b0y-H/d/}
MOV AX, 4C00H G!AICcP^
INT 21H
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END 0v;ve
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dz8-):
x86 CPU,GNU/Linux,NASM Bfbl#ZkyL
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). jIKBgsiF/
;Enter this into "hello.asm" then type: cYsR0#
;"nasm -f elf hello.asm" @[n2dmj
;"ld hello.o -o hello" gBMta+<fE~
;"./hello" 7^c2e*S
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section .data ;data section declaration A$/KP\0Y2
msg db 'Hello World!',0AH ]a8eDy
len equ $-msg ;string length g* %bzfk=|
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section .text ;code section declaration D 5=C^`$2
global _start ;entry point (start of execution) fW(;
_start: mov edx,len ;string length *zJD$+Fo
mov ecx,msg ;string start #]"/{Z
mov ebx,1 ;file handle: stdout 1Pu
, :Jt
mov eax,4 ;sys_write Q?Wr7
int 80h ;kernel system call ,Yo: &>As
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mov ebx,0 ;return value t9ER;.e
mov eax,1 ;sys_exit >Ja0hS{*
int 80h ;kernel system call ggMUdlU
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x86 CPU,Windows,MASM32 ri,2clp
.386 ',DeP>'%>
.model flat,stdcall o\d |CE;>
option casemap:none TV?
^c?{5
;Include 文件定义 n:F@gZd`
include windows.inc VIetcs
include user32.inc "pYe-_"@
includelib user32.lib ,bxz]S1W
include kernel32.inc VcP:}a< B\
includelib kernel32.lib fQxSMPWB
;数据段 &Y{F?
c^
.data x 96}#0'
szCaption db 'A MessageBox!',0 l+oDq'[q"
szText db 'Hello,world!',0 b S,etd
;代码段 KvGbDG
.code |n)<4%i8J
start: <Uf|PFVj$
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK Ks|gL#)*Ku
invoke ExitProcess,NULL -P2 @mx%
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> {d8^@UL
end start k@7kNMl
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AWK 2mQOj$Lv
BEGIN { print "Hello, world!" } {798=pC<.
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BASIC qv.n9 9?]
传统版BASIC(例如GWBASIC): 0"4J"q]&
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10 PRINT "Hello, world!" Dp^95V@
20 END (:JjQ`i
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或在提示符输入: 0Qt~K#mr/
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?"Hello, world!":END #T[%6(QW
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现代版BASIC(例如Quick BASIC): ATo}FL 2
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Print "Hello, world!" -7&?@M,u
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以下的语句在Quick BASIC中同样有效: (p^S~Ax
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? "Hello,world!" )t5;d
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s~=g*99H
BCPL KLW&bJ$|j
GET "LIBHDR" f7ZA837Un
R#D#{cC(
LET START () BE Y!F!@`%G
$( Q~8y4=|#CY
WRITES ("Hello, world!*N") hc"6u\>
$) JfSdUWxT
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hw*1g m
Befunge
C[R`Ml
"!dlrow olleH">v +eC3?B8rN
, .3( ;9};
^_@ _Cj(fFL
mLQUcYfR
M= atls
Brainfuck x+K gc[r
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< UP R/XQ
+++++++++++++++.>.+++.------.--------.>+.>. %iX/y
h>| g2h
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C n? }5!
#include <stdio.h> jK e.gA
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int main(void) 3h LqAj
{ 72u db^
printf("Hello, world!\n"); :1*zr
return 0; zx7#)*
} xvdY
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C++ ZRPE-l_3:
#include <iostream> my4\mi6P
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int main() G@B*E%$9
{ ^g[J*{+!W
std::cout << "Hello, world!" << std::endl; a&N