“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。 Xi&J%N'
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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》。 &-ropY
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以下是用不同语言写成的Hello World程序的几个例子: 9wWBE<}>u
Ada $"kPzo~B_
with Ada.Text_Io; use Ada.Text_Io; lME>U_E
procedure Hello is E^i]eK*"
begin &$
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Put_Line ("Hello, world!"); aas.-NT
end Hello; hN-@_XSw<I
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汇编语言 glMHT,
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x86 CPU,DOS,TASM |u&cN-}C d
MODEL SMALL
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IDEAL (9'^T.J
STACK 100H 7{|QkTg C
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DATASEG P3_.U8g$r
HW DB 'Hello, world!$' $O%{l.-O
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CODESEG rpT.n-H>%A
MOV AX, @data L80(9Y^xn
MOV DS, AX ~Bzzu %S
MOV DX, OFFSET HW p>B2bv+L
MOV AH, 09H 8 t5kou]h
INT 21H t7+A!7b{
MOV AX, 4C00H EA& 3rI>U)
INT 21H bHwEd%f
END m^_=^z+
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x86 CPU,GNU/Linux,NASM T D_@0Rd
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). z:,PwLU
;Enter this into "hello.asm" then type: eM5?fE&!&
;"nasm -f elf hello.asm" ^ po@U"
;"ld hello.o -o hello"
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;"./hello" ffrIi',@
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section .data ;data section declaration {a7~P0$
msg db 'Hello World!',0AH xe`^)2z
len equ $-msg ;string length |mb2<! ag{
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section .text ;code section declaration ~e{ @ 5.g
global _start ;entry point (start of execution) 1 R5pf
_start: mov edx,len ;string length ZwmucY%3
mov ecx,msg ;string start j_Szw
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mov ebx,1 ;file handle: stdout NQ9v[gv
mov eax,4 ;sys_write kka5=u
int 80h ;kernel system call ;5Sdx5`_
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mov ebx,0 ;return value WgtLKRZ\
mov eax,1 ;sys_exit $]2)r[eA)
int 80h ;kernel system call jJ,_-ui
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x86 CPU,Windows,MASM32 N^Re
.386 `AJ[g>py^|
.model flat,stdcall b^1QyX^?:
option casemap:none eVXXn)>
;Include 文件定义 C 0w+
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include windows.inc TQa}Ps
include user32.inc 3nxG>D7
includelib user32.lib VeoG[Jl
include kernel32.inc zCx4DN`
includelib kernel32.lib f9D e!"*&
;数据段 `Fy-"Uf
.data (j:
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szCaption db 'A MessageBox!',0 ^jdU4
szText db 'Hello,world!',0 t^rw@$"}
;代码段 Jz@~$L
.code ?8b19DMK6
start: !|cg=
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK GtA`0B
invoke ExitProcess,NULL h!EA;2yGKa
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> tq3Wga!5
end start }r,\0Wm
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BEGIN { print "Hello, world!" } Tg\bpLk0=
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BASIC G95,J/w
传统版BASIC(例如GWBASIC): {Mx(|)WkL
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10 PRINT "Hello, world!" M([#Py9h
20 END o96C^y{~S
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或在提示符输入: wVf~FssN
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?"Hello, world!":END IPiV_c-l
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现代版BASIC(例如Quick BASIC): ]-fkmnmWX
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Print "Hello, world!" ?^}30V:E
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以下的语句在Quick BASIC中同样有效: %bW_,b
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? "Hello,world!" 8%?y)K^
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BCPL ^J!q>KJs
GET "LIBHDR" /ZLY@&M
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LET START () BE jlEz]@
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WRITES ("Hello, world!*N") N##`
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Befunge >DqF>w.1
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Brainfuck XYE|=Tr]
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< x0*{oP
+++++++++++++++.>.+++.------.--------.>+.>. M `xiC
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C ~/
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#include <stdio.h> JzHG5nmB
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int main(void) 4zug9kFK
{ C@rGa7
printf("Hello, world!\n"); R%E7 |NAG
return 0; bS.w<V
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} DSGcxM+
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C++ cs9^&N:w[
#include <iostream> JTlk[c
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int main() >ZA=9v
{ bp1AN9~
std::cout << "Hello, world!" << std::endl; .8hI
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return 0; +/:tap|V
} C*9X;+S0J
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C++/CLI gr=h!'m
int main() %x)bZ=An
{ M[uWX=
System::Console::WriteLine("Hello, world!"); z\YIwrq3*
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C# (C Sharp) ;"3B,Yj
class HelloWorldApp jYsAL=oh,*
{ 98m|&7
public static void Main() Fsx?(?tCMo
{ 4
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System.Console.WriteLine("Hello, world!"); ~j0rORy]
} 'J|2c;M\x
} ,Q`qnn&
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