“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。 x'*,~u
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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》。 |VMc,_D
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以下是用不同语言写成的Hello World程序的几个例子: H6?ZE
Ada Cd)e_&
with Ada.Text_Io; use Ada.Text_Io; Srj%6rgsB
procedure Hello is h+F@apUS
begin 2f\;#-
Put_Line ("Hello, world!"); jq(3y|6,
end Hello; 1BQTvUAA
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汇编语言 Ti`<,TA54
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x86 CPU,DOS,TASM ;hR!j!3}
MODEL SMALL "Q9S<O8)
IDEAL v<bq1QG
STACK 100H fVv#|
Frn#?n)S9
DATASEG ):?ype>
HW DB 'Hello, world!$' Ls#pe
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CODESEG ElAJR4'{*i
MOV AX, @data :7%JD .;W
MOV DS, AX eU_|.2
MOV DX, OFFSET HW &3v{~Xg)
MOV AH, 09H dj4 g
INT 21H Qfo'w%px
MOV AX, 4C00H `Yp\.K z
INT 21H M`\c'|i/
END E(tdL,m'
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x86 CPU,GNU/Linux,NASM {OP-9P=p
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). ie^:PcU
;Enter this into "hello.asm" then type: "lLt=s2>L
;"nasm -f elf hello.asm" DrbjqQL+.
;"ld hello.o -o hello" Taxi79cH
;"./hello" W]5kM~Q@
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section .data ;data section declaration d+~c$(M)
msg db 'Hello World!',0AH {y<[1Pms
len equ $-msg ;string length ba|x?kz
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section .text ;code section declaration y=YD4m2 W
global _start ;entry point (start of execution) mJewUc!<5
_start: mov edx,len ;string length g#`(&
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mov ecx,msg ;string start 1YR;dn
mov ebx,1 ;file handle: stdout (xK=/()}q
mov eax,4 ;sys_write |tz1'YOB
int 80h ;kernel system call R?1;'pvpa[
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mov ebx,0 ;return value `ea;qWy
mov eax,1 ;sys_exit U
jVo "K
int 80h ;kernel system call tr7FV1p
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x86 CPU,Windows,MASM32 -Qo`UL.}
.386 l#%Y]1*
.model flat,stdcall ?yddr`?W
option casemap:none ih2H~c>O
;Include 文件定义 T2Cdw\
include windows.inc S +|aCRS
include user32.inc kxoJL6IC
includelib user32.lib eOy{]<l3
include kernel32.inc s['F?GWg
includelib kernel32.lib IkH]W!_+
;数据段 Lcplc"C
.data N<Rb<p%
szCaption db 'A MessageBox!',0 8^p/?R^bu
szText db 'Hello,world!',0 !40{1U&@a`
;代码段 *Au4q<
.code cg7NtY
start: Ts0.Ck
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK g6Qzkvw)
invoke ExitProcess,NULL W2tIt&{
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 9/D+6hJ]:
end start T#J]%IDd
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AWK !fwLC"QC
BEGIN { print "Hello, world!" } &AGV0{NMh]
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BASIC T'\lntN
传统版BASIC(例如GWBASIC): gO<>L0,j
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10 PRINT "Hello, world!" {#=q[jVi%1
20 END +
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或在提示符输入: [rU8%
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?"Hello, world!":END iK(n'X5i
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现代版BASIC(例如Quick BASIC): RJnRbaC
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Print "Hello, world!" ;.!AX|v
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以下的语句在Quick BASIC中同样有效: nXb;&n%
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? "Hello,world!" -}9ZZ#K
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BCPL ocAoqjlT[
GET "LIBHDR" mcb0%
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LET START () BE e}(ws~.
$( rh${pHl
WRITES ("Hello, world!*N") ,8c`
$) xO'1|b^&
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Befunge
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Brainfuck lk%rE
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< Hl?\P6
+++++++++++++++.>.+++.------.--------.>+.>. J ;i/X;^
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C W _yVVr
#include <stdio.h> C*/d%eHD
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int main(void) ;5q=/
{ S3P;@Rm
printf("Hello, world!\n"); 31
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return 0; 1$q SbQ
} F[l{pc "C
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C++ )4D |sN
#include <iostream> G;yf]xFd
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int main() [L{q
{ :jT1=PfL
std::cout << "Hello, world!" << std::endl; 'eLO#1Ipf
return 0; =Mc*~[D/
} 3(}W=oI
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C++/CLI "/(J*)%{
int main() ss-{l+Z5
{ ,&G