“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。 i`U:gw
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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》。 (ClhbfzD
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以下是用不同语言写成的Hello World程序的几个例子: 5vp|?-\h>
Ada A;K(J4y*
with Ada.Text_Io; use Ada.Text_Io; IFNWS,:
procedure Hello is %Tcf6cK"
begin -<f/\U
Put_Line ("Hello, world!"); 0Vv9BL{
end Hello; I?Y d
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汇编语言 R|,7d:k
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x86 CPU,DOS,TASM X33v:9=
MODEL SMALL N{akg90
IDEAL <zB*'m
STACK 100H 7Ur?ep
iv%w!3#
DATASEG ,\ldz(D?+
HW DB 'Hello, world!$' w8M2N]&:
SBKeb|H8
CODESEG rnhFqNT:
MOV AX, @data Bt~s*{3$8
MOV DS, AX ``4wX-y
MOV DX, OFFSET HW :xeLt;
MOV AH, 09H *_hLD5K!
INT 21H WO</Q6+
MOV AX, 4C00H 2wpjU&8W!
INT 21H a0_(eO-S
END )*1.eObhL
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x86 CPU,GNU/Linux,NASM |"k&fkS$
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). `7Ug/R<
;Enter this into "hello.asm" then type: 1$LI px
;"nasm -f elf hello.asm" <!x+eE`
;"ld hello.o -o hello" :X>DkRP
;"./hello" xxX/y2\
CMVS W6
section .data ;data section declaration `| 9K u
msg db 'Hello World!',0AH $C_M&O}
len equ $-msg ;string length PnWD}'0V
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section .text ;code section declaration F|eu<^"$ H
global _start ;entry point (start of execution) pG yRX_;
_start: mov edx,len ;string length +$pJ5+v
mov ecx,msg ;string start X-Ycz 5?
mov ebx,1 ;file handle: stdout =I4.Gf"~f
mov eax,4 ;sys_write 5{l1A(b
int 80h ;kernel system call :$H!@n*/R
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mov ebx,0 ;return value 'F_}xMU
mov eax,1 ;sys_exit S ~|.&0"\
int 80h ;kernel system call QlzQ]:dWC
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x86 CPU,Windows,MASM32 HhSjR%6HY;
.386 } p'8w\C$
.model flat,stdcall =MSu3<y,
option casemap:none m6n hC
;Include 文件定义 X%4h(7;v
include windows.inc Eb@MfL
include user32.inc jxY-u+B
includelib user32.lib b7$}JCn
include kernel32.inc U6{dI@|B
includelib kernel32.lib 4;<DJ.XlN=
;数据段 +WF.wP?y
.data 31XU7A
szCaption db 'A MessageBox!',0 olty4kGD$V
szText db 'Hello,world!',0 N/{?7sG&
;代码段 -<oZ)OfU
.code j[DIz@^
start: a-PGW2G
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK g_ M-F
invoke ExitProcess,NULL 6E+=Xi
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> &BgU:R,
end start 5u,sx664
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BEGIN { print "Hello, world!" } oh&Y<d0
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BASIC R<g =\XO'y
传统版BASIC(例如GWBASIC): < l[`"0
[ X|OrRA
10 PRINT "Hello, world!" i QqbzOY
20 END (3fPt;U
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或在提示符输入: TN ci.']
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?"Hello, world!":END 6y@<?08Q
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现代版BASIC(例如Quick BASIC): {HuLuP0t
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Print "Hello, world!" OK\]*r
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以下的语句在Quick BASIC中同样有效: y h-9u
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? "Hello,world!" r5)f82pQ
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BCPL )dg UmN
GET "LIBHDR" h544dNo&
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LET START () BE @7|)RSBQz
$( &ps6s.K
WRITES ("Hello, world!*N") r %xB8e9
$) M=Is9)y
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Befunge Vx(;|/:
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