“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。 NKX62 ZC
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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》。 L3s1a -K
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以下是用不同语言写成的Hello World程序的几个例子: X
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Ada ,!i!q[YkL9
with Ada.Text_Io; use Ada.Text_Io; 67]kT%0
procedure Hello is ;+6TZqklQ
begin ("!P_Q#
Put_Line ("Hello, world!"); .9'bi#:Cw
end Hello; L';b908r2
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汇编语言 AJWV#J%nB
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x86 CPU,DOS,TASM 6&qT1nF1
MODEL SMALL Kx<T;iJ}
IDEAL <GRplkf`
STACK 100H 8+=-!":]
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DATASEG wSGW_{;-
HW DB 'Hello, world!$' W, YYL(L
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CODESEG Xpp%j
MOV AX, @data E,EpzB$_dj
MOV DS, AX q8-*3K
MOV DX, OFFSET HW //O9}-
MOV AH, 09H Ku3/xcu:My
INT 21H +61h!/<W
MOV AX, 4C00H x4 .Y&Wq#
INT 21H G0^,@jF?b
END nbf w7u
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x86 CPU,GNU/Linux,NASM %'vLkjI.
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). 27CVAX ghV
;Enter this into "hello.asm" then type: 898=9`7e
;"nasm -f elf hello.asm" _W +
;"ld hello.o -o hello" 4w<4\zT_U}
;"./hello" W%,h{
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section .data ;data section declaration miv)R
msg db 'Hello World!',0AH WPXLN'w+
len equ $-msg ;string length o+F]80CH
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section .text ;code section declaration YI!@,t
global _start ;entry point (start of execution) <>I4wqqb
_start: mov edx,len ;string length xmp^`^v*
mov ecx,msg ;string start 9u%S<F"
mov ebx,1 ;file handle: stdout fJ8Q\lb<_
mov eax,4 ;sys_write ckCb)r_
int 80h ;kernel system call sY*iRq
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mov ebx,0 ;return value tIJ?caX5=
mov eax,1 ;sys_exit c*:H6(u
int 80h ;kernel system call T>e4Og"?
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x86 CPU,Windows,MASM32 KH_~DZU*5
.386 25m6/Y
.model flat,stdcall Zwm2T3@e
option casemap:none 9EI Oa/*
;Include 文件定义 klON6<w
include windows.inc *!p#1fE
include user32.inc ZL{\M|@jz
includelib user32.lib HAOl&\)7"_
include kernel32.inc ~4 {|
includelib kernel32.lib .e|VW)
;数据段 WK)2/$7@
.data 8 "5^mj
szCaption db 'A MessageBox!',0 fBZAO
szText db 'Hello,world!',0 NL7CeHs5
;代码段 8IrA{UU
.code mO|YX/>
start: !T3b]0z
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK xfsf
invoke ExitProcess,NULL F9\T<
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> nJ{vO{N
end start o1B8_$aYgc
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AWK [8OQ5}do/
BEGIN { print "Hello, world!" } @}[yC['
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BASIC $~s|%>@
传统版BASIC(例如GWBASIC):
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10 PRINT "Hello, world!" 7>sNjOt@M
20 END Q#a<T4l
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或在提示符输入: tITx+i
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?"Hello, world!":END T|fmO<e*n
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现代版BASIC(例如Quick BASIC): 3LK]VuZE
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Print "Hello, world!" rr;p;
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以下的语句在Quick BASIC中同样有效: t<