“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。 1zxq^BI
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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》。 ,'fxIO
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以下是用不同语言写成的Hello World程序的几个例子: u1^wDc*xg
Ada {QAv~S>4
with Ada.Text_Io; use Ada.Text_Io; mpw~hW0-
procedure Hello is ZWUP^V
begin ^jE8+h
Put_Line ("Hello, world!"); W"q@Qa`Bm
end Hello; *OjKcs
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汇编语言 +IFw_3$
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x86 CPU,DOS,TASM
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MODEL SMALL N)2f7j4C&
IDEAL V$`Gwr]|n
STACK 100H U(>4s]O6
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DATASEG H}}$V7]^),
HW DB 'Hello, world!$' *e>]~Z,
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CODESEG _qwQ;!9
MOV AX, @data YwEpy(}hJm
MOV DS, AX %ysZ5:X
MOV DX, OFFSET HW yay<GP?
MOV AH, 09H (N-RIk73/O
INT 21H =uHnRY
MOV AX, 4C00H !^oV #
INT 21H kOwMs<1J
END friWW^
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x86 CPU,GNU/Linux,NASM dUrElXbXd
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). ||7x;2e
;Enter this into "hello.asm" then type: &)d$t'7p
;"nasm -f elf hello.asm" VosZJv=
;"ld hello.o -o hello" f|7\DeY9U
;"./hello" <W8t|jt
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section .data ;data section declaration +n0r0:z0
msg db 'Hello World!',0AH c_grPk2O4
len equ $-msg ;string length 796\jf$
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section .text ;code section declaration $@-P5WcRs
global _start ;entry point (start of execution) g#]" hn
_start: mov edx,len ;string length 3f.b\4 U
mov ecx,msg ;string start t_z>Cl^u
mov ebx,1 ;file handle: stdout *D}0[|O
mov eax,4 ;sys_write f5*k7fg
int 80h ;kernel system call 4S"\~><
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mov ebx,0 ;return value `3H4Ajzcc
mov eax,1 ;sys_exit } p
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int 80h ;kernel system call C@ZK~Y_g
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x86 CPU,Windows,MASM32 GYxM0~:$k
.386 8H,4kY?Z
.model flat,stdcall ]B"'}%>ez
option casemap:none z}QwP~Z
;Include 文件定义 H(c72]@Vg
include windows.inc lf{e[!ML'
include user32.inc qU2~fNY
includelib user32.lib k %e^kej
include kernel32.inc <P[T!gST
includelib kernel32.lib bK"SKV
;数据段 i$G;f^Z!Y
.data XgN` 7!Z
szCaption db 'A MessageBox!',0 h+p*=|j`
szText db 'Hello,world!',0 u@'0Vk0zGH
;代码段 :NHH
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.code c .3ZXqpI;
start: ,u }XWV
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK q\Q{sv_
invoke ExitProcess,NULL TNCgaTJ{h
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> d<!3`qe
end start <9E0iz+j
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BEGIN { print "Hello, world!" } Xp\/YJOibd
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BASIC 4%4avEa"w
传统版BASIC(例如GWBASIC): (fNUj4[
v 8T$ &-HJ
10 PRINT "Hello, world!" ;{i'#rn{
20 END 0nn okN^
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或在提示符输入: K8n4oz#z
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?"Hello, world!":END 'E/*d2CDM(
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现代版BASIC(例如Quick BASIC): H9h@ sSg
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Print "Hello, world!" #_lt~^6
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以下的语句在Quick BASIC中同样有效: U~h'*nV&
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? "Hello,world!" 7^wc)E^H
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BCPL swA+f
GET "LIBHDR" Hsih[f
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LET START () BE Nx{$}
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