“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。 P'f0KZL;
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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》。 cpz'upVOZ
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以下是用不同语言写成的Hello World程序的几个例子: :N03$Tvl
Ada [0|g3K!A
with Ada.Text_Io; use Ada.Text_Io; UB[tYZ
procedure Hello is JTbg8b
begin hz#S b~g
Put_Line ("Hello, world!"); lU]/nKyd
end Hello; %gj's-!!
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汇编语言 f1GV6/| m
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x86 CPU,DOS,TASM s/ [15
MODEL SMALL 0tbximmDb
IDEAL i*34/
STACK 100H :&D>?{b0
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DATASEG V_Z ~$
HW DB 'Hello, world!$' ly`p)6#R=
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CODESEG `:WVp~fn
MOV AX, @data bz!9\D|h
MOV DS, AX 3&Dln
MOV DX, OFFSET HW YrAaL"20
MOV AH, 09H &8!*u3
INT 21H ZUGuV@&-T
MOV AX, 4C00H 4k'2FkDA
INT 21H =Ny&`X#F
END Oi{X \Y
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x86 CPU,GNU/Linux,NASM ~F7 +R
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). `>:ozN#)\
;Enter this into "hello.asm" then type: =XWew*
;"nasm -f elf hello.asm" hpJ[VKe
;"ld hello.o -o hello" 6itp
Mck
;"./hello" S.o 9AUv9
c-nBB
section .data ;data section declaration 0gNwC~IA8
msg db 'Hello World!',0AH AHsp:0Ma#
len equ $-msg ;string length xLht6%o*
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section .text ;code section declaration 3UeG>5R
global _start ;entry point (start of execution) jJ%
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_start: mov edx,len ;string length f(q^R
mov ecx,msg ;string start SF*!Z2K
mov ebx,1 ;file handle: stdout ahgm*Cpc
mov eax,4 ;sys_write cy=,Dr9O
int 80h ;kernel system call dR2#n
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mov ebx,0 ;return value +gb2>fei&
mov eax,1 ;sys_exit l'YpSO~l7
int 80h ;kernel system call 6hKavzSi
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x86 CPU,Windows,MASM32 75vd ]45as
.386 hg7`jE&2
.model flat,stdcall d!)
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option casemap:none ,sPsL9]$
;Include 文件定义 Zyqh
include windows.inc MtOAA
include user32.inc fd >t9.
includelib user32.lib = !D<1<
include kernel32.inc 8.D$J
includelib kernel32.lib w91gM*A
;数据段 (n7v $A
.data ai"Kd=R
szCaption db 'A MessageBox!',0 ;zI;oY#.y
szText db 'Hello,world!',0 }x% ;y]S
;代码段 L+Q"z*W
.code $x;wnXXXM
start: LL Oe
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK )_!t9gn*wr
invoke ExitProcess,NULL fx|$(D@9
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> l= 5kd.{
end start xy`aR< L
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AWK u>:sXm
BEGIN { print "Hello, world!" } #tG/{R
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BASIC O6gI%Jdp
传统版BASIC(例如GWBASIC): N,|:=gD_
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10 PRINT "Hello, world!" ,c_[`q\
20 END 5}gcJjz
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或在提示符输入: z<_{m4I;
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?"Hello, world!":END b8)>:F
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现代版BASIC(例如Quick BASIC): s9)
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Print "Hello, world!" SFKW"cP
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以下的语句在Quick BASIC中同样有效: B&|F9Z6D
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? "Hello,world!" 0[}"b(O{
Md'd=Y_0
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BCPL sJtz{'
GET "LIBHDR" m *8[I
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LET START () BE @u3K.}i:g
$( |0n h
WRITES ("Hello, world!*N") l epR}
$) Y~RPspHW
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Befunge 2;.7c+r0
"!dlrow olleH">v -fVeE<[
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