“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。 t1y4 7fX6
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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》。 *ppffz
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以下是用不同语言写成的Hello World程序的几个例子: "!%l/_p?
Ada nQ,HMXj
with Ada.Text_Io; use Ada.Text_Io; hFl^\$Re
procedure Hello is 9 j9TPyC/2
begin X(-4<B
Put_Line ("Hello, world!"); n#OB%@]<V
end Hello; J6FV]Gpv
?m?::R H
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汇编语言 = {wcfhUl+
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x86 CPU,DOS,TASM uGEfIy 2
MODEL SMALL }d}Ke_Q0
IDEAL vTzlwK\#1
STACK 100H ?oHpFlj
r
# cGop]
DATASEG _8_R 1s
HW DB 'Hello, world!$' psMvq@>
*6DB0X_-}
CODESEG g~A`N=r;h
MOV AX, @data -:y,N
9^
MOV DS, AX "mvt>X
MOV DX, OFFSET HW .+A+|yR
MOV AH, 09H 1F&Trqq
INT 21H [}0haTYc4
MOV AX, 4C00H Vt&2z)Zz
INT 21H \ Et3|Iv
END (S\[Y9
zsyIV!(
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x86 CPU,GNU/Linux,NASM (\YltC@q%
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax).
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;Enter this into "hello.asm" then type: <s<n
;"nasm -f elf hello.asm" [;),\\u,d
;"ld hello.o -o hello" ~<F8ug#
;"./hello" 9H`XeQ.
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section .data ;data section declaration 0*D$R`$
msg db 'Hello World!',0AH WuUk9_g
len equ $-msg ;string length \$T(t/$9
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section .text ;code section declaration Doyx[zZ
global _start ;entry point (start of execution) qm8B8&-
_start: mov edx,len ;string length Cl8Cg~2
mov ecx,msg ;string start fN^8{w/O
mov ebx,1 ;file handle: stdout \B,@`dw
mov eax,4 ;sys_write iE^84l68
int 80h ;kernel system call G.a b ql
h-<81"}j1
mov ebx,0 ;return value pm0{R[:T7
mov eax,1 ;sys_exit Ata:^qI
int 80h ;kernel system call UJ7*j%XQz_
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3>`mI8$t
x86 CPU,Windows,MASM32 }" %?et(
.386 EGU
0)<
.model flat,stdcall SdxDa
option casemap:none hxd`OG<gF
;Include 文件定义 94.DHZqh
include windows.inc EF}\brD1
include user32.inc r8rgY42
includelib user32.lib J({Xg?
include kernel32.inc RF4vtQC=
includelib kernel32.lib 9FYUo
;数据段 tKx~1-
.data gS]@I0y8
.
szCaption db 'A MessageBox!',0 ZWU)\}}_R
szText db 'Hello,world!',0 n QZwC
;代码段 O#~yKqB
.code /quc}"__
start: gANuBWh8T
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK Rmt~,cW!\
invoke ExitProcess,NULL ][h%UrV
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
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end start $f=J2&D,Cz
{xB!EQ"
rt~d6|6
AWK Tc &z:
BEGIN { print "Hello, world!" } (U_ujPD ?
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BASIC {e9@-
传统版BASIC(例如GWBASIC): JZ*/,|1}EC
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10 PRINT "Hello, world!" 6x[}g
20 END L<-_1!wh
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或在提示符输入: \[_t]'p
a /l)qB#
?"Hello, world!":END {9;CNsd
>#~& -3
现代版BASIC(例如Quick BASIC): >j(_[z|v3
cr?Q[8%t1
Print "Hello, world!" BsqP?/
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以下的语句在Quick BASIC中同样有效: 37 ,
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? "Hello,world!" xH(lm2kvT
wb5baY9
z.9U}F
BCPL %x{kc3PnO
GET "LIBHDR" m=A(NKZ
>G*eNn
LET START () BE foF({4q7b^
$( %.Fi4}+O
WRITES ("Hello, world!*N") A gg<tM{yB
$) H*&f: