“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。 LOYk9m
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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》。 MjRHA^b
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以下是用不同语言写成的Hello World程序的几个例子: =XQ%t
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Ada RP|`HkP-2
with Ada.Text_Io; use Ada.Text_Io; ?$pCsBDo
procedure Hello is yPp9\[+^j
begin cVpp-Z|s8
Put_Line ("Hello, world!"); IP pN@
end Hello; y.k~Y0
!BF;
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汇编语言 372rbY
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x86 CPU,DOS,TASM ; 2#y7!
MODEL SMALL Tidn-2L73O
IDEAL t?gic9
q
STACK 100H T!{w~'=F
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DATASEG ^76]0`gS
HW DB 'Hello, world!$' re<{
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t@;p
CODESEG wlvgg
MOV AX, @data B[Scr5|
MOV DS, AX P+sW[:
MOV DX, OFFSET HW 3?yg\
MOV AH, 09H (CL%>5V
INT 21H l'qg8
MOV AX, 4C00H n@i HFBb
INT 21H T-L||yE,h
END vr l-$ii
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x86 CPU,GNU/Linux,NASM _[3D
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). }X6m:#6
;Enter this into "hello.asm" then type: $%Kfq[Q
;"nasm -f elf hello.asm" +\A,&;!SR
;"ld hello.o -o hello" 3hH<T.@)
;"./hello" =nS3p6>rZ
#!#
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section .data ;data section declaration 6 "sSo j
msg db 'Hello World!',0AH B9 uoVcW
len equ $-msg ;string length WH} y"W
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section .text ;code section declaration I236RIq
global _start ;entry point (start of execution)
(ZizuHC
_start: mov edx,len ;string length F>l]
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mov ecx,msg ;string start RqrdAkg
mov ebx,1 ;file handle: stdout Avc%2+
mov eax,4 ;sys_write \\qZl)P_
int 80h ;kernel system call 59A}}.@?m
)akoa,#%6c
mov ebx,0 ;return value LL!Dx%JZ
mov eax,1 ;sys_exit 8<.Oq4ku
int 80h ;kernel system call Il'fL'3
t*u:hex
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x86 CPU,Windows,MASM32 n\53w h@+
.386 Sm|6 %3
.model flat,stdcall "+s++@
z
option casemap:none 9A=,E&
;Include 文件定义 4HlQ&2O%#
include windows.inc M2Qr(K|
include user32.inc (A#^l=su
includelib user32.lib VONDc1%ga
include kernel32.inc eauF~md,
includelib kernel32.lib 0h_|t-9j
;数据段 Y3b *a".X
.data Yq
KCeg
szCaption db 'A MessageBox!',0 Z9|P'R(l
szText db 'Hello,world!',0 7:1Lol-V
;代码段 jLluj
.code R/YqyT\SM
start: 5]0<9a
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK %h@EP[\
invoke ExitProcess,NULL bAMdI 5Zk?
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> l_p2Riv
end start ,J@
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AWK {wKB;?fUvk
BEGIN { print "Hello, world!" } { <