“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。 "+BuFhSLf
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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》。 9cMMkOM J
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以下是用不同语言写成的Hello World程序的几个例子: '_xa>T}
Ada }i\_`~
with Ada.Text_Io; use Ada.Text_Io; 4Y@q.QP
procedure Hello is r / L
begin l{_1`rC'
Put_Line ("Hello, world!"); &|Vzo@D(!
end Hello; kgRgHkAH~
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汇编语言 6Kd,(DI
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x86 CPU,DOS,TASM &s&Ha{(!w
MODEL SMALL SS-7y:6y>
IDEAL HOVzpj
STACK 100H 0&2&F=fOa<
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DATASEG a3BlydSlf
HW DB 'Hello, world!$' SvD:UG
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CODESEG Y-*]6:{E
MOV AX, @data ;3sJ7%`v
MOV DS, AX x]:B3_qR
MOV DX, OFFSET HW B{Lcx ~
MOV AH, 09H !p4FK]B/u
INT 21H [JVUa2Sm
MOV AX, 4C00H "J3n_3+
INT 21H "ODs.m oq
END &4Y@-;REt
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x86 CPU,GNU/Linux,NASM IQ9Rvnna
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). ==~
lc;
;Enter this into "hello.asm" then type: P vS\
;"nasm -f elf hello.asm" 1?T^jcny:M
;"ld hello.o -o hello" 6XGqZ!2
;"./hello" h)yAge
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section .data ;data section declaration MY>o8A
msg db 'Hello World!',0AH u-~?ylh
len equ $-msg ;string length 2aW"t.[j
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section .text ;code section declaration 8x<; AL|`
global _start ;entry point (start of execution) ]WC@*3'kye
_start: mov edx,len ;string length j;i7.B"[
mov ecx,msg ;string start Dad*6;+N
mov ebx,1 ;file handle: stdout [moz{Y
mov eax,4 ;sys_write ILXV yU
int 80h ;kernel system call LgoUD*MbQ
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mov ebx,0 ;return value OW8"7*irT
mov eax,1 ;sys_exit ?rv5Z^D'
int 80h ;kernel system call 7_AcvsdW
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x86 CPU,Windows,MASM32 HVcd< :g0
.386 uVV;"LVK~
.model flat,stdcall ]_P!+5]<
option casemap:none n$(_(&
;Include 文件定义 O8WLulo
include windows.inc nHmi%R7k
include user32.inc RU GhhK
includelib user32.lib npdpKd+*K"
include kernel32.inc {!7 ^w
includelib kernel32.lib +"2IQme5
;数据段 }\)O1
.data ]!04L}hy|P
szCaption db 'A MessageBox!',0 i.*Utm`1"e
szText db 'Hello,world!',0 qUF}rlS=r
;代码段 iKuSk~
.code bZ*J]1y(.
start: L;k9}HWpP
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK Ym"Nj
invoke ExitProcess,NULL E;^~}
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> <eG8xC
end start *%xmCPJ
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BEGIN { print "Hello, world!" } )6:nJ"j#
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BASIC F;^GhiQVS
传统版BASIC(例如GWBASIC): $^4URH
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10 PRINT "Hello, world!" SB'$?Kh
20 END }J&[Uc
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或在提示符输入: []rg'9B2b
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?"Hello, world!":END _e3kO6X
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现代版BASIC(例如Quick BASIC): DU/WB
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Print "Hello, world!" ^}4=pkJ;s
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以下的语句在Quick BASIC中同样有效: ngoAFb
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? "Hello,world!" Q(Dp116
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BCPL &\, ZtaB
GET "LIBHDR" H%:~&_D
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LET START () BE wLf=a^c#
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WRITES ("Hello, world!*N") ,#PeK(
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Befunge k )T;WCia
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C KXP^F6@l
#include <stdio.h> +)4_1i4"x
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int main(void) {Y! -]_5
{ 8N|y
printf("Hello, world!\n"); lxpi
return 0; 'K=n}}&:
} b{KpfbxcI
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C++ 'W/E*O6BY
#include <iostream> `eat7O
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int main() XO*62>Ed
{ JR1/\F<}
std::cout << "Hello, world!" << std::endl; 85<zl|ZD
return 0; OE(Z)|LF
} D<zgs2Ex
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C++/CLI IGj%)_W
int main() bojx:g
{ q1Vh]d
System::Console::WriteLine("Hello, world!"); i6p0(OS&D
} -o\r]24
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C# (C Sharp) ei>8{v&g
class HelloWorldApp h5-<2B|
{ tc%?{W\
public static void Main() *5bKJgwJ
{ c[4H
System.Console.WriteLine("Hello, world!"); !Qu)JR
} :_%
} ^h
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COBOL !tkP!%w
IDENTIFICATION DIVISION. 2G'Au} q0n
PROGRAM-ID. HELLO-WORLD. wD-(3ZVd4
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ENVIRONMENT DIVISION. @3/.W +
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DATA DIVISION. $\xS~w
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PROCEDURE DIVISION. T/#$44ub
DISPLAY "Hello, world!". HF9d~7R
STOP RUN. ;Zb+WGyj
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