“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。 ?zQW9e
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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》。 TspX7<6r
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以下是用不同语言写成的Hello World程序的几个例子: \o=9WKc
Ada 5gV,^[E-z
with Ada.Text_Io; use Ada.Text_Io; DBG0)=SHy
procedure Hello is LT>_Y`5>
begin hW'b'x<
Put_Line ("Hello, world!"); yf!7
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end Hello; @$!6u0x
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汇编语言 SP/b4
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x86 CPU,DOS,TASM [PB73q8
MODEL SMALL IZm6.F
IDEAL `"PHhCG+z
STACK 100H &@'%0s9g
~ @*q8lC
DATASEG otfmM]f
HW DB 'Hello, world!$' ](v,2(}=
ah
f,- ?S
CODESEG kZo#Ny
MOV AX, @data w\0vP
MOV DS, AX H }]Zp
MOV DX, OFFSET HW ""
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MOV AH, 09H -G@uB_C s
INT 21H bcjh3WP
MOV AX, 4C00H r]&sXKDc
INT 21H 65JG#^)KaX
END TB?'<hD:
f0Q! lMv
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x86 CPU,GNU/Linux,NASM &bfM`h'
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). H ?9Bo!
;Enter this into "hello.asm" then type: `?.6}*4@_A
;"nasm -f elf hello.asm" W1<*9O
;"ld hello.o -o hello" 7Ok-T10
;"./hello" fa,:d8
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section .data ;data section declaration \m}a%/
msg db 'Hello World!',0AH 7Hv6>z#m
len equ $-msg ;string length 2;*G!rE&*`
;di.U,
section .text ;code section declaration Sz<:WY/(x
global _start ;entry point (start of execution) Lg(G&ljE@k
_start: mov edx,len ;string length V`LE 'E
mov ecx,msg ;string start j^8HTa0Cy|
mov ebx,1 ;file handle: stdout -zMvpe-am&
mov eax,4 ;sys_write $*$4DG1gaR
int 80h ;kernel system call "%+||IyW
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mov ebx,0 ;return value ":
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mov eax,1 ;sys_exit R!7--]Wcg
int 80h ;kernel system call <dE~z] P
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x86 CPU,Windows,MASM32 7VZ ^J`3
.386 YU0pWM
.model flat,stdcall A{B$$7%
option casemap:none )'g4Ty
;Include 文件定义 YGM7? o
include windows.inc bA Yp }
include user32.inc 0Bp0ScE|FA
includelib user32.lib %
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include kernel32.inc i !sVQ(:
includelib kernel32.lib n#WOIweInf
;数据段 muF&t'k
.data |5FEsts[
szCaption db 'A MessageBox!',0 s0vcGh#w
szText db 'Hello,world!',0 yB*aG
;代码段 N;P/$
.code Z ]ZUK
start: qFDy)4H)
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK U
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invoke ExitProcess,NULL xJ:Am>%\^
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> o](ORS$~
end start s5{H15
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AWK #=Xa(<t
BEGIN { print "Hello, world!" } V_v+i c^
_f "I%QTL
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BASIC L:lnm9<
传统版BASIC(例如GWBASIC): e*(
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3)&rj 7
10 PRINT "Hello, world!" #&S<{75A
20 END E6G;fPd= E
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或在提示符输入: U;.cXU{
B@ \0b|
?"Hello, world!":END rSW{1o'
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现代版BASIC(例如Quick BASIC): \[+':o`LH
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Print "Hello, world!" }gX4dv
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以下的语句在Quick BASIC中同样有效: x5U;i
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? "Hello,world!" X/Fip0i
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BCPL n1+J{EPH
GET "LIBHDR" X)[QEq^
m Ub2U&6(
LET START () BE V-i:t,*lk(
$( ^'sOWIzeiY
WRITES ("Hello, world!*N") a[lx&CHgI
$) wYHyVY2tj2
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Xd~li fF
Befunge :J5CmU$
"!dlrow olleH">v *q Ins/@
, gp{P _
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Brainfuck :Sk<0VVd7
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+++++++++++++++.>.+++.------.--------.>+.>. OPKmYzf@b
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C =1F F2#zS
#include <stdio.h> nQ'AB~ Do
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int main(void)
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{ P$;_YLr
printf("Hello, world!\n"); MWc{7,
return 0; F8Z6Ss|v3
} UC9w T
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C++ :w c.V
#include <iostream> s0'Xih sw6
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