“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。 {FNCC*=
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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》。 Tn'o$J
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以下是用不同语言写成的Hello World程序的几个例子: o^d
Ada 7%|HtBXv^
with Ada.Text_Io; use Ada.Text_Io; gp\o|igT
procedure Hello is J32"Ytdo<
begin 5N#Sic M
Put_Line ("Hello, world!"); >Qf`xUZ
end Hello; /p{$HkVw
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汇编语言 ?KFj=Yo
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x86 CPU,DOS,TASM _ o6Zj1p
MODEL SMALL T
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IDEAL jq[Q>"f
STACK 100H .|LY /q\A
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DATASEG *kNXju
HW DB 'Hello, world!$' y#J8Yv8
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CODESEG mN"g~o*
MOV AX, @data ou\~^
MOV DS, AX kybDw{(}gc
MOV DX, OFFSET HW jrO{A3<E
MOV AH, 09H Mgux(5`;
INT 21H :w9s bW
MOV AX, 4C00H %Xl(wvd
INT 21H q:P44`Aq
END m>^#:JK
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x86 CPU,GNU/Linux,NASM DLEHsbP{$
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). 5"7lWX
;Enter this into "hello.asm" then type: M^y5 Dep
;"nasm -f elf hello.asm" 1v9#Fr Y
;"ld hello.o -o hello" z#srgyLt
;"./hello" %xN91j["
! ?GW<Rh
section .data ;data section declaration LE+#%>z>
msg db 'Hello World!',0AH 7eyx cr;z
len equ $-msg ;string length jY$3
_vOSOnU
section .text ;code section declaration Vdb X4^V
global _start ;entry point (start of execution) ~J1UzUxX2
_start: mov edx,len ;string length K;~I;G
mov ecx,msg ;string start u[LsH
mov ebx,1 ;file handle: stdout 6;}W)S
mov eax,4 ;sys_write $+w -r#,
int 80h ;kernel system call ds'7zxy/
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mov ebx,0 ;return value a(K^/BT
mov eax,1 ;sys_exit ]= 9^wS
int 80h ;kernel system call j.g9O]pi
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x86 CPU,Windows,MASM32 dJ=z'?|%g
.386 tQ(gB_
.model flat,stdcall 2~!+EH
option casemap:none &&|c-mD+*
;Include 文件定义 QR[i9'`<
include windows.inc V?-OI>
include user32.inc -hP>;~*4
includelib user32.lib ;c0z6E /
include kernel32.inc w7Vl,pN,
includelib kernel32.lib e~Z>C>J
;数据段 cy( WD#^
.data Y~-P9
szCaption db 'A MessageBox!',0 ck#MpQ!An
szText db 'Hello,world!',0 ),4cb
;代码段 h$a%PaVf
.code
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start: oz/Nx{bg
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK {h}e 9
invoke ExitProcess,NULL Q1u/QA:z7
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> >WYradLUi
end start hD>cxo
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BEGIN { print "Hello, world!" } nQ^ c{Bm:
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BASIC 4xzoA'Mb@
传统版BASIC(例如GWBASIC): -gy@sSfvkv
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10 PRINT "Hello, world!" "'*w_H0
20 END &bT \4
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或在提示符输入: |lVoL.Z,0
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?"Hello, world!":END W60C$*h
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现代版BASIC(例如Quick BASIC): ;n;bap
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Print "Hello, world!" eaCh;IpIf
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以下的语句在Quick BASIC中同样有效: <~R{U>zO
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? "Hello,world!" 5 p! rZ
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BCPL p1B~F
GET "LIBHDR" zJX _EO
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LET START () BE ])H[>.?K
$( XPsRa[08WK
WRITES ("Hello, world!*N") &BS*C} },
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Befunge :|PgGhW
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+++++++++++++++.>.+++.------.--------.>+.>. ]c~W$h+F
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C UTR`jXCg
#include <stdio.h> M
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int main(void) 1&#qq*{
{ 1?,1EYT"
printf("Hello, world!\n"); -wrVhCd~g]
return 0; j$Wd[Ja+O
} lmpBf{~ S
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C++ A#KfG1K>
#include <iostream> EaUO>S
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int main() 9U]j@*QN
{ bTbF
std::cout << "Hello, world!" << std::endl; {dXmSuO
return 0; b>x03%
} wjc&