“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。 -HbC!wv
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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》。 -#[a7',Z;
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以下是用不同语言写成的Hello World程序的几个例子: z+wA
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Ada G@\1E+Ip
with Ada.Text_Io; use Ada.Text_Io; &j`} vg
procedure Hello is ".V$~n(
begin '~<m~UXvD#
Put_Line ("Hello, world!"); K`WywH3-
end Hello; Wx}8T[A}
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汇编语言 \)N9aV
,j{,h_Op
x86 CPU,DOS,TASM ) 1f~ dR88
MODEL SMALL Q#X8u-~
IDEAL Dlae;5D
STACK 100H AaOuL,l
F?*-4I-
DATASEG M61xPq8y5
HW DB 'Hello, world!$' =pO^7g
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CODESEG ~O0 $Suv
MOV AX, @data y/{fX(aV
MOV DS, AX 2DtM20<>
MOV DX, OFFSET HW nI-w}NQ
MOV AH, 09H Egp/f|y
INT 21H mt{nm[D!Xp
MOV AX, 4C00H 0/MtYIYk
INT 21H y/cvQY0pU
END c
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x86 CPU,GNU/Linux,NASM _x'6]f{n
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). ^z IW+:
;Enter this into "hello.asm" then type: F=e8 IUr
;"nasm -f elf hello.asm" 2!m/
;"ld hello.o -o hello" IGQaDFr
;"./hello" 2B[X,rL.pX
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section .data ;data section declaration 9igiZmM
msg db 'Hello World!',0AH 3g,`.I_
len equ $-msg ;string length dI(@ZV{
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section .text ;code section declaration jh%Eq+#S
global _start ;entry point (start of execution) x(6SG+Kr
_start: mov edx,len ;string length Smn;(K
mov ecx,msg ;string start A@[o;H}XP
mov ebx,1 ;file handle: stdout @ $ ;q;
mov eax,4 ;sys_write hHGoP0/o
int 80h ;kernel system call U0y% u
Eu d*_>|
mov ebx,0 ;return value /wEhVR`=
mov eax,1 ;sys_exit Ys!82M$g
int 80h ;kernel system call X::JV7hu
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x86 CPU,Windows,MASM32 (AaoCa[
.386 IqaT?+O\?r
.model flat,stdcall ]Kt6^|S$a
option casemap:none C=L>zOZ
;Include 文件定义 v\gLWq'
include windows.inc 5oW!YJg
include user32.inc 4K#>f4(U`g
includelib user32.lib xQ-<WF1i
include kernel32.inc B$fPgW-
includelib kernel32.lib KE5kOU;
;数据段 Q:G4Z9Kt
.data (ylTp]~mR-
szCaption db 'A MessageBox!',0 {9&;Q|D z
szText db 'Hello,world!',0
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;代码段 DrUO-
.code i(%W_d!
start: /tx]5`#@7]
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK TOB-aAO
invoke ExitProcess,NULL y|i,|
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> ?r
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end start |^"1{7)
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AWK s 8jV(P(O
BEGIN { print "Hello, world!" } "Y
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BASIC X8a/ `Y,
传统版BASIC(例如GWBASIC): s^G.]%iU
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10 PRINT "Hello, world!" r[`9uVT/
20 END -8ywO"6
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或在提示符输入: VGy<")8D/
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?"Hello, world!":END ,Bi.1
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现代版BASIC(例如Quick BASIC): Z*]9E^
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Print "Hello, world!" <sGVR5NR
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以下的语句在Quick BASIC中同样有效: Xv5wJlc!d
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? "Hello,world!" r"3=44St
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BCPL \R9(x]nZ%
GET "LIBHDR" shy-Gu&
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LET START () BE 36&e.3/#
$( [[Ls_ZL!=
WRITES ("Hello, world!*N") F3[T.sf
$) ^+>laOzC`8
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2+N]PW\V
Befunge j?3wvw6T
"!dlrow olleH">v WtsFz*`)y
, njB;&N)I
^_@ ?DS@e@lx
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Brainfuck ~OYiq}g
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< x*\Y)9Vgy
+++++++++++++++.>.+++.------.--------.>+.>. {=9,n\85#
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C A7Cm5>Y_S
#include <stdio.h> kYP#SH/
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int main(void) $t'MSlF
{ y4
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printf("Hello, world!\n"); "rALt~AX
return 0; \_VA50
} hohfE3rd
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C++ b4%??"&<Y
#include <iostream> !3c\NbU
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int main() ONB{_X?
{ @p9i
std::cout << "Hello, world!" << std::endl; )Yh+c=6
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return 0; 38Mv25N
} x}wG:K
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/Vx7mF:
C++/CLI wv>^0\o
int main() htO+z7
{ Y!aSs3c
System::Console::WriteLine("Hello, world!"); >NGj
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