“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。 TRL4r_
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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》。 2f9~:.NgF
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以下是用不同语言写成的Hello World程序的几个例子: iA3d[%tBb
Ada j0B, \A
with Ada.Text_Io; use Ada.Text_Io; yv=LT~
procedure Hello is DmEmv/N=
begin {mY<R`Ee
Put_Line ("Hello, world!"); c9/w-u~j
end Hello; *v)JX _
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汇编语言 QU|{(c
S5*wUd*p#
x86 CPU,DOS,TASM {9vvj
MODEL SMALL 0APwk
}
IDEAL \:mx Ri
STACK 100H Po'yr] pr
r483"k(7
DATASEG wv>Pn0cO
HW DB 'Hello, world!$' }jBr[S5
ol^V@3[<
CODESEG ;2q;RT`h
MOV AX, @data M p:c.
MOV DS, AX vmK<_xbwd
MOV DX, OFFSET HW @+h2R
MOV AH, 09H 5gARGA
INT 21H 4Z)`kS}=]
MOV AX, 4C00H $6}siU7s4
INT 21H EGO;g^,
END )_"Cz".|9
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x86 CPU,GNU/Linux,NASM w~y+Pv@
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). rVowHP
;Enter this into "hello.asm" then type: zDeh#
;"nasm -f elf hello.asm" x tg3~/H
;"ld hello.o -o hello" >gM|:FG
;"./hello" V|zzj[c
I gcVl/d
section .data ;data section declaration IE.JIi^w
msg db 'Hello World!',0AH &>\E
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len equ $-msg ;string length kD
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section .text ;code section declaration aF2eGh
global _start ;entry point (start of execution) #~*fZ|sq+3
_start: mov edx,len ;string length ';us;xR#
mov ecx,msg ;string start I1^0RB{~
mov ebx,1 ;file handle: stdout S1(. AI~
mov eax,4 ;sys_write /s.sW l
int 80h ;kernel system call ?1?D[7$
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mov ebx,0 ;return value nF0$
mov eax,1 ;sys_exit ,u^i0uOg
int 80h ;kernel system call zD}dvI}
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x86 CPU,Windows,MASM32 Q<B=m6~
.386 P$S>=*`n
U
.model flat,stdcall 6f,#O8]#5
option casemap:none u:&gp
;Include 文件定义 Yf&x]<rkCp
include windows.inc ,+<NP}Yg#G
include user32.inc pm$,B7Q`oO
includelib user32.lib KGdL1~
include kernel32.inc @;2,TY>Di
includelib kernel32.lib 8`XpcK-0
;数据段 zRN_`U
.data 0^nnR7
szCaption db 'A MessageBox!',0 Z7%
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szText db 'Hello,world!',0 ~F~g$E2 }
;代码段 "gjy+eosY
.code cJj4qXF
start: g+;m?VJ
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK '
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invoke ExitProcess,NULL fQRGz\r*k
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> XSC._)ztEE
end start o#gb+[
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AWK m-S4"!bl
BEGIN { print "Hello, world!" } eE5U|y)_
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BASIC +168!Jw;
传统版BASIC(例如GWBASIC):
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`VY -3
10 PRINT "Hello, world!" \M(0@#-$C
20 END Eh&*"&fHR
0G ^73Z
或在提示符输入: |S[Gg
LPX@oh a
?"Hello, world!":END {;1Mud
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