“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。 3WUH~l{UJ
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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》。 RN9;kB)c
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以下是用不同语言写成的Hello World程序的几个例子: 1@qgF
Ada [Qj;/
with Ada.Text_Io; use Ada.Text_Io; <]d
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procedure Hello is d%ME@6K)
begin Hj6'pJ4
Put_Line ("Hello, world!"); ue{xnjw>U
end Hello; ,={t8lN
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汇编语言 7wVH8^|
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x86 CPU,DOS,TASM rx!=q8=0R
MODEL SMALL n7! H:{L
IDEAL (S/F)?
STACK 100H 'jfRt-_-
j-b* C2l
DATASEG &c%Y<1e`%
HW DB 'Hello, world!$' 0XU}B\'<
n}n EcXb
CODESEG 8@\7&C(g17
MOV AX, @data "![L#)"s
MOV DS, AX qoX@@xr1
MOV DX, OFFSET HW vHKlLl>*2
MOV AH, 09H ELD!{bMT
INT 21H JAjku6
MOV AX, 4C00H \ |!\V
INT 21H K$[$4 dX]
END U[\Vj_?(I
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x86 CPU,GNU/Linux,NASM A9:NKY{z
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). uGVy6,
;Enter this into "hello.asm" then type: Da1aI]{I
;"nasm -f elf hello.asm" I'!/[\_
;"ld hello.o -o hello" MaY682}|y
;"./hello" v"O5u%P
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section .data ;data section declaration I4c!m_sr
msg db 'Hello World!',0AH <L0#O(L
len equ $-msg ;string length osP\DiQ
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section .text ;code section declaration ftbpqp'
global _start ;entry point (start of execution) 01@t~v3!Z
_start: mov edx,len ;string length md Gwh7/3
mov ecx,msg ;string start zsQoU&D 5
mov ebx,1 ;file handle: stdout l*=aMjd?
mov eax,4 ;sys_write EqB)sK/3
int 80h ;kernel system call g@ith&*=h
[(mlv42"
mov ebx,0 ;return value 3iX?~
mov eax,1 ;sys_exit |U'I/A
int 80h ;kernel system call svhI3"r
kxB.,'
g P}+wbk
x86 CPU,Windows,MASM32 F"jt&9jg
.386 @{HrJ/4%:&
.model flat,stdcall aUopNmN
option casemap:none vqdX^m^PY
;Include 文件定义
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include windows.inc b/("Y.r=
include user32.inc zu\`1W^
includelib user32.lib _lxco=qd=%
include kernel32.inc j}J Z
includelib kernel32.lib q6d~V]4:
;数据段 ,FSrn~-j9
.data ^+|De}`u
szCaption db 'A MessageBox!',0 | A)\
:
szText db 'Hello,world!',0 b^CNVdo'
;代码段 ~/#1G.H
.code PAF8Wlg
start: 6"
B%)0
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK 5FeFN)
invoke ExitProcess,NULL Kq6jw/T
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> t67Cv/r~
end start 5"KlRuv%
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AWK 6p;m\
BEGIN { print "Hello, world!" } }j{!-&
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BASIC I/J7rkf
传统版BASIC(例如GWBASIC): sy5 Fn~\R
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10 PRINT "Hello, world!" ^"8wUsP
20 END Hf gz02Z$
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或在提示符输入: s][24)99
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?"Hello, world!":END &:#h$`4
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现代版BASIC(例如Quick BASIC): 4"?^UBr
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Print "Hello, world!" L@Nu/(pB=
LRb,VD:/Y
以下的语句在Quick BASIC中同样有效: 4_?7&G0(
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? "Hello,world!" ib6^x:HGU
AONDx3[
2'0K WYM
BCPL uKr1Z2
GET "LIBHDR" SI:ifR&T
2 ][DZl
LET START () BE &