“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。 $C^tZFq
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将Hello World程序作为第一个学写的程序,现在已经成为一种传统。该程序最早出现在由Brian Kernighan和Dennis Ritchie写的计算机程序设计教程《C语言程序设计》。 ^hy Y,X
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以下是用不同语言写成的Hello World程序的几个例子: r@)_>(
Ada t gpg
with Ada.Text_Io; use Ada.Text_Io; +3wVcL
procedure Hello is 9]]isE8r
begin ZNN^
Put_Line ("Hello, world!"); _X/`7!f
end Hello; W? SFtz
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d) i64"
汇编语言 H="E#AC%8/
(fUpj^E)p
x86 CPU,DOS,TASM B{6wf)[O
MODEL SMALL W!=X_
IDEAL ^f?>;,<&
STACK 100H ]8~{C>ch$
.KeZZLH
DATASEG B K/_hNz
HW DB 'Hello, world!$' 2M`:/ shq
7,BULs\g
CODESEG I|eYeJ3
MOV AX, @data tA{B~>
MOV DS, AX BSd\Sg4
MOV DX, OFFSET HW (;6vT'hE
MOV AH, 09H zxhE9 [`*e
INT 21H %Ix
MOV AX, 4C00H kH|cB!?x
INT 21H o-7,P
RmKN
END
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cy{ ado2
^0T DaZDLp
x86 CPU,GNU/Linux,NASM 57~/QEdy
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). i[7<l&K]
;Enter this into "hello.asm" then type: 2Q81#i'Cm
;"nasm -f elf hello.asm" -:~"c@D
;"ld hello.o -o hello" }T1.~E
;"./hello" G W@g
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section .data ;data section declaration k,GAHM"'
msg db 'Hello World!',0AH viXt]0
len equ $-msg ;string length QXLHQ_V
=,w(D~ps
section .text ;code section declaration nA4PY]
global _start ;entry point (start of execution) =6H
_start: mov edx,len ;string length yq<mE(hS?
mov ecx,msg ;string start ~Kiu"
g
mov ebx,1 ;file handle: stdout |SSe n#PYp
mov eax,4 ;sys_write :ND e<6?u
int 80h ;kernel system call OGWZq(c"6
1ww#]p`1
mov ebx,0 ;return value RTQtXv6mD
mov eax,1 ;sys_exit Bp9_\4
int 80h ;kernel system call a,`f`;\7N%
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x86 CPU,Windows,MASM32 R^k)^!/$f
.386 4Gor*{
.model flat,stdcall H7?Sd(U
option casemap:none PW QRy
;Include 文件定义 0 P2lq
include windows.inc HD!2|b~@
include user32.inc $az9Fmta
includelib user32.lib 0i4XS*vPv
include kernel32.inc P0<)E
includelib kernel32.lib wY xk[)&Y
;数据段 )l6(ss!J
.data `NB6Of*/
szCaption db 'A MessageBox!',0 vp&N)t_
szText db 'Hello,world!',0 q~6a$8+t
;代码段 # ~(lY}
.code M.u1SB0
start: ^`+Kjhht
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK *6/OLAkyF
invoke ExitProcess,NULL kHz?vVE/l
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> AOv>O52F/Q
end start 34:Y_*
]Wg&r Y0
2ut)m\)/)
AWK %G/(7l[W
BEGIN { print "Hello, world!" } 0WQd#l
V i<6i0
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BASIC ,Q,3^v-
传统版BASIC(例如GWBASIC): @B9O*x+n:
63HtZ=hO7
10 PRINT "Hello, world!" d$B+xW
20 END }m93AL_y
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或在提示符输入: =;{8)m
iLk"lcX
?"Hello, world!":END }e-D&