“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。 |E]`rfr
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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》。 iO$Z?Dyg9
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以下是用不同语言写成的Hello World程序的几个例子: c+dmA(JC
Ada Z+p'3
with Ada.Text_Io; use Ada.Text_Io; {Xr|L
procedure Hello is "XKcbdr8-
begin $TU:iv1Fm
Put_Line ("Hello, world!"); Dx1f<A1
end Hello; IOL5p*:gz
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汇编语言 {Q?\%4>2
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x86 CPU,DOS,TASM _8QHx;}
MODEL SMALL U5[,UrC
IDEAL 4hl`~&yDf
STACK 100H z4!Y9
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DATASEG n]nb+_-97
HW DB 'Hello, world!$' Z'Uc}M'U
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CODESEG :t)<$dtf[
MOV AX, @data ]h3{MTr/
MOV DS, AX 3'*}ZDC
MOV DX, OFFSET HW $M:Ru@Du2
MOV AH, 09H $u"*n\k>
INT 21H ^ "D
MOV AX, 4C00H ;\mTm;]G
INT 21H %DQ!#Nl*
END `4Db( ~
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x86 CPU,GNU/Linux,NASM V;N'?Gu
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). PR+L6DT_
;Enter this into "hello.asm" then type: zWA~0l.2
;"nasm -f elf hello.asm" Ung K9uB~
;"ld hello.o -o hello" ~;AJB
;"./hello" v)c[-:"z
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section .data ;data section declaration =w,cdU*
msg db 'Hello World!',0AH KtMD?
len equ $-msg ;string length V#Pz`D
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section .text ;code section declaration qA;!Pql`
global _start ;entry point (start of execution) y+aL5$x6
_start: mov edx,len ;string length UL3++bt
mov ecx,msg ;string start c{(4s6D
mov ebx,1 ;file handle: stdout Bk
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mov eax,4 ;sys_write KlbUs\E
int 80h ;kernel system call _N1UL?
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mov ebx,0 ;return value [kp#
mov eax,1 ;sys_exit Yn>y1~
int 80h ;kernel system call b0:5i<"w6
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x86 CPU,Windows,MASM32 - ]Mbe2;
.386 H_&z-g`
.model flat,stdcall JI7.:k;
option casemap:none A<*G;
;Include 文件定义 w~|z0;hC
include windows.inc * .P3fVlZ
include user32.inc (X|`|Y
includelib user32.lib S(NUuu}S
include kernel32.inc _/pdZM,V
includelib kernel32.lib %YLyh?J
;数据段 u.!<)VIJx
.data 8]2j*e0xV
szCaption db 'A MessageBox!',0 ^`f( Pg!
szText db 'Hello,world!',0 wK*b2r}0/
;代码段 0(h'ZV
.code egHvI&w"o
start: n[c/L8j
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK &{=`g+4n
invoke ExitProcess,NULL V|T3blG?D
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> uc?`,;8{`
end start {!av3Pz\
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BEGIN { print "Hello, world!" } :/6gGU>pu
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BASIC =5D@~?W ZG
传统版BASIC(例如GWBASIC): Z.{r%W{2
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10 PRINT "Hello, world!" -MTO=#5z
20 END r4wnfy
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或在提示符输入: Z#_ +yw
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?"Hello, world!":END RI0+9YJ
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现代版BASIC(例如Quick BASIC): $8t\|O3
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Print "Hello, world!" 67b[T~92o
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以下的语句在Quick BASIC中同样有效: .#wU+t>
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? "Hello,world!" ufc_m4PN
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BCPL `mo>~c7
GET "LIBHDR" mj^]e/s%
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LET START () BE h_?#.z0ih;
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WRITES ("Hello, world!*N") Yv7`5b{N.
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Befunge $0wF4$)
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Brainfuck j[q$;uSD
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< @ZFU< e$!
+++++++++++++++.>.+++.------.--------.>+.>. :1(UC}v
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C _!'sj=n]q
#include <stdio.h> _0c$SK
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int main(void) 0Q= o"@
{ {I~[a#^
printf("Hello, world!\n"); QnPgp(d<
return 0; AcCM
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} z6
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C++ RI2Or9.
#include <iostream> x|oa"l^JZ"
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int main() |0A:0'uA!
{ z,#3YC{'
std::cout << "Hello, world!" << std::endl; Me|+)}'p5h
return 0; twA2U7F
} 0-{l4;o
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C++/CLI t1h2ibO
int main() g0~3;y
{ }^/;8cfLY
System::Console::WriteLine("Hello, world!"); `9yR,Xk=l
} \mt>R[
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C# (C Sharp) FeM,$&G:
class HelloWorldApp -$J%.fdPs
{ ;n-IpR#|
public static void Main() 68v59)0U
{ c6NCy s
System.Console.WriteLine("Hello, world!"); J@I-tS
} mK2M1r
} w}jH,Ew
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COBOL 8*V8B=q}K
IDENTIFICATION DIVISION. ^-'t`mRl]d
PROGRAM-ID. HELLO-WORLD. l8_TeO
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ENVIRONMENT DIVISION. M+N7JpR
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DATA DIVISION. W%k0_Y/5
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PROCEDURE DIVISION. U2(|/M+
DISPLAY "Hello, world!". ZdJer6:Z}
STOP RUN. c*"TmDY
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