“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。 bJ,=yB+0
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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》。 AXU!-er$
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以下是用不同语言写成的Hello World程序的几个例子: ^0ZKHR(}e
Ada j=jrzG+`
with Ada.Text_Io; use Ada.Text_Io; E'BH7JV
procedure Hello is _@~kYz
begin FUqhSW
Put_Line ("Hello, world!"); <C.$Db&9
end Hello; RkH oT^
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汇编语言 R:IS4AaS
Lq
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x86 CPU,DOS,TASM 2W:?#h3
MODEL SMALL }b]y
0"
IDEAL kJ<Xq
STACK 100H f/[?5M[
;AL@<,8
DATASEG tCCi|*P
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HW DB 'Hello, world!$' iB`WXU
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CODESEG hzPB~obC
MOV AX, @data
jQ\
MB
MOV DS, AX zS"zb
MOV DX, OFFSET HW .McoW7|Y
MOV AH, 09H Lc: SqF
INT 21H p:Ld)U *
MOV AX, 4C00H FiU;>t<)
INT 21H :Ye#NPOI
END ;pNbKf:
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x86 CPU,GNU/Linux,NASM ,Qi|g'a
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). PN^1
;Enter this into "hello.asm" then type: eGypXf%
;"nasm -f elf hello.asm" R
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;"ld hello.o -o hello" y[@j0xlO
;"./hello" ZR q}g:
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section .data ;data section declaration NF\^'W@N
msg db 'Hello World!',0AH UE`4$^qs
len equ $-msg ;string length M>H^<N}'A
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section .text ;code section declaration cLko
global _start ;entry point (start of execution) 'SD|ObBY
_start: mov edx,len ;string length Y <i}"eI*
mov ecx,msg ;string start -MW(={#
mov ebx,1 ;file handle: stdout Y./}zCT
mov eax,4 ;sys_write RdVis|7o
int 80h ;kernel system call K\E]X\:
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mov ebx,0 ;return value R6@~
mov eax,1 ;sys_exit a~eLkWnh<k
int 80h ;kernel system call @?cXa: tX
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ec?n #7
:2Rci`lp
x86 CPU,Windows,MASM32 8J?`_
.386
X-r,>o:
.model flat,stdcall !#4HGjPI
option casemap:none kR~4O$riG
;Include 文件定义 mF:s-+
include windows.inc DHNii_w4v
include user32.inc lGHu@(n<
includelib user32.lib K2o0L5Lke
include kernel32.inc *9{Wn7pck/
includelib kernel32.lib %TTL^@1!b
;数据段 {*Wwu
f.
.data )I-?zyL
szCaption db 'A MessageBox!',0 oS|~\,p"
szText db 'Hello,world!',0 }~~^ZtJ\
;代码段 6V6g{6W,/
.code k|c0tvp
start: (5DGs_>
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK Vh9s.=*P@
invoke ExitProcess,NULL #~-&&S4a.J
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CJtjn
end start `1}?{ud
FITaL@{c
)Gp\_(9fc
AWK lLFBop
BEGIN { print "Hello, world!" } {UC<I.5X
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BASIC Fl3r!a!P,
传统版BASIC(例如GWBASIC): +C;#Qf
U\ E{-7
10 PRINT "Hello, world!" >A( C9_\
20 END C2|2XL'l(C
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或在提示符输入: $AhX@|?z
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?"Hello, world!":END Au*?)X- $
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现代版BASIC(例如Quick BASIC): !vp!\Zj7o
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Print "Hello, world!" x[~OVG0M*
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以下的语句在Quick BASIC中同样有效: u0KZrz
Qr-J-2s ?B
? "Hello,world!"
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+9F#~{v`4a
KXfW&d(Pk
BCPL yrNc[kS/
GET "LIBHDR" D#[ :NXahn
(E(:F[.S
LET START () BE j/mp.'P1k
$( FY}*Z=D%
WRITES ("Hello, world!*N") yB{o_1tc
$) {,2_K6#
EAXU{dRV
LP6FSo~K
Befunge w >BFgb?
"!dlrow olleH">v &u\z
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, RW^ v {'o
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UKQ&TV}0
2.2a2.I1
Brainfuck ?q }wl\"8
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< 3Wxtxk._E
+++++++++++++++.>.+++.------.--------.>+.>. :bDn.`KG#
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C
QLU;.&
#include <stdio.h> Kf^F#dA
X0QS/S-+
int main(void) Ck%(G22-
{ D\*_ulc]
printf("Hello, world!\n"); >Io7h#[u
return 0; xxcDd_z
} QF "&~
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C++ }v,P3
#include <iostream> R+hS;F nh%
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