“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。 i.M2E$b|
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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》。 "{ FoA3g|
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以下是用不同语言写成的Hello World程序的几个例子: { *$9,
Ada ?:/|d\,7@
with Ada.Text_Io; use Ada.Text_Io; <m]wi7
procedure Hello is CV3DMA
begin F@EJtwLd5y
Put_Line ("Hello, world!"); >A=\8`T^
end Hello; (bvoF5%
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汇编语言 > 0T
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x86 CPU,DOS,TASM H(&Z:{L
MODEL SMALL t!t=|JNf{
IDEAL 6v>z h
STACK 100H \igaQ\~
oCuV9dA.
DATASEG Hm4bN\%
HW DB 'Hello, world!$' :1MMa6
c{4R*|^
CODESEG `)tA
YH
MOV AX, @data A?,A(-0C
MOV DS, AX %Rarr
MOV DX, OFFSET HW @c]Xh:I
MOV AH, 09H j3 P$@<
INT 21H 7"K^H]6u30
MOV AX, 4C00H
W_}/ O'l{
INT 21H .CS v|:'1
END m[rL\](-
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x86 CPU,GNU/Linux,NASM ,]q%/yxi
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). U&Ab#m;
;Enter this into "hello.asm" then type: zo44^=~%
;"nasm -f elf hello.asm" R@n5AN(
;"ld hello.o -o hello" 8Zw]f-5x\
;"./hello" aDveU)]=1
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section .data ;data section declaration Bc[6*Y,%T
msg db 'Hello World!',0AH OoM_q/oI
len equ $-msg ;string length ]3+`` vL
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section .text ;code section declaration =YHt9fb$c
global _start ;entry point (start of execution) GX5W^//}
_start: mov edx,len ;string length +* D4(
mov ecx,msg ;string start GoD ?K C
mov ebx,1 ;file handle: stdout jsZY{s=
mov eax,4 ;sys_write rS,j;8D-
int 80h ;kernel system call 2d~LNy
>?V<$>12
mov ebx,0 ;return value g ;LVECk
mov eax,1 ;sys_exit BSDk9Oc
int 80h ;kernel system call ^IgS
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x86 CPU,Windows,MASM32 m}pL`:e!
.386 f~*K {7
.model flat,stdcall ttj2b$M,
option casemap:none `:4MMr9 1
;Include 文件定义 50,Y
include windows.inc O9*p0%ug
include user32.inc `p1DaV
includelib user32.lib :x+ig5
include kernel32.inc <m1sSghg
includelib kernel32.lib e?=elN
;数据段 n;qz^HXEJ
.data !-RwB@\
szCaption db 'A MessageBox!',0 !7c'<[+Hm
szText db 'Hello,world!',0 |[ocyUsxX
;代码段 `j:M)2:*y
.code W>:kq_gT
start: A$<>JVv
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK pyF5S,c
invoke ExitProcess,NULL XN(tcdCG
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> >2Ca5C
end start s|gp
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AWK %YCd%lAe,
BEGIN { print "Hello, world!" } VF=Z`
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BASIC 17i$8
传统版BASIC(例如GWBASIC): H/`G
a[ i>;0
10 PRINT "Hello, world!" SUc6/'Rdr
20 END `Hd9\;NJ
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或在提示符输入: iD`k"\>9
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?"Hello, world!":END 5 H *>
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现代版BASIC(例如Quick BASIC):
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s ^3[W0hL
Print "Hello, world!" (Com,
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以下的语句在Quick BASIC中同样有效: 'z-D%sCA
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? "Hello,world!" .HCaXFW
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BCPL 3`ml;
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GET "LIBHDR" _ .!aBy%xf
pX^=be_
LET START () BE ?$16A+
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WRITES ("Hello, world!*N") c>rKgx
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Befunge ;le0QA
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Brainfuck ^ `je
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< !%V*UR9
+++++++++++++++.>.+++.------.--------.>+.>. )gjGG8Ee
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C La]4/=a
#include <stdio.h> hRLKb}
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int main(void) I^@.Awt
{ `^zQ$au'u
printf("Hello, world!\n"); v?}pi
return 0; Y!aLf[x]
} 7g8B'ex J
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C++ #.b^E3#+
#include <iostream> gLV^Z6eE
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int main() <0>[c<{V<
{ UFL0 K
std::cout << "Hello, world!" << std::endl; c<>y!^g
return 0; ~n8F7
} VD9J}bgJ
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C++/CLI 5/k)\`
int main() E::<;9
{ 4V1|jy3
System::Console::WriteLine("Hello, world!"); &62`Wr 0C
} p#z;cjfSt
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C# (C Sharp) ;}f6Y['z
class HelloWorldApp "`[ $&:~
{ tgc@7
public static void Main() [1mIdwS
{ 6S)$3Is
System.Console.WriteLine("Hello, world!"); )S#j.8P'B
} ynx WQ%d(`
} 7f[8ED[4
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COBOL !\3}R25
IDENTIFICATION DIVISION. = >P_mPP=
PROGRAM-ID. HELLO-WORLD. P&h/IBA_
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ENVIRONMENT DIVISION. #DrZ`Aq
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DATA DIVISION. 9&&kgKKGQ
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PROCEDURE DIVISION. 8xc8L1;
DISPLAY "Hello, world!". "^18&>^
STOP RUN. VyRW '
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Common Lisp buc,M@>
(format t "Hello world!~%") |zK!+fu
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DOS批处理 fmatc#G
@echo off {hlT`K
echo "Hello, world!" cw*(L5bu
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Eiffel !pG+Ak?
class HELLO_WORLD 8L%%eM_O
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creation p_D
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make @1/Q
feature <