“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。 wm}6$ n?Za
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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》。 nw+L _b
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以下是用不同语言写成的Hello World程序的几个例子: hc4<`W{
Ada b'p bf
with Ada.Text_Io; use Ada.Text_Io; RFU(wek
procedure Hello is YR@@:n'TP
begin 1Thr74M
Put_Line ("Hello, world!"); ;EP 7q[
end Hello; J^R))R=
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汇编语言 Mc#uWmc 7
lbZ,?wm
x86 CPU,DOS,TASM dE7 kd=.o
MODEL SMALL [rC-3sGar
IDEAL rRRiqmq
STACK 100H vvU;55-
8 P.t
DATASEG 17I{_C
HW DB 'Hello, world!$' @Y 1iEL%\y
R
rs?I,NV
CODESEG cKEf- &~
MOV AX, @data B.-5$4*s
MOV DS, AX 9<I@}w
MOV DX, OFFSET HW >9'G>~P~I=
MOV AH, 09H ,A[40SZA
INT 21H (YVl5}V
MOV AX, 4C00H G"T)+!6t
INT 21H TRL4r_
END `C%,Nj
: ~"^st_[!
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x86 CPU,GNU/Linux,NASM <W2}^q7F^
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). *91iFeKj=
;Enter this into "hello.asm" then type: >"q0"zrN,
;"nasm -f elf hello.asm" ^hv
;"ld hello.o -o hello" odMjxWY
;"./hello" OD-CU8X9
B q+RFo
section .data ;data section declaration `<i|K*u
msg db 'Hello World!',0AH 6Xb\a^q
len equ $-msg ;string length z'=*pIY5f
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section .text ;code section declaration c[}h( jkP
global _start ;entry point (start of execution) C'4u+raq
_start: mov edx,len ;string length B$1nq#@
mov ecx,msg ;string start 1k6f|Al-
mov ebx,1 ;file handle: stdout Wp/!;
mov eax,4 ;sys_write *[*LtyCQt4
int 80h ;kernel system call pg1o@^OuL
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mov ebx,0 ;return value dE!{=u(!i
mov eax,1 ;sys_exit
.'mmn5E
int 80h ;kernel system call M p:c.
\j !JRD+j
%Rj:r!XB:
x86 CPU,Windows,MASM32 W?mn8Y;{`
.386 QMea2q|3$
.model flat,stdcall %_;q<@9)
option casemap:none \u?z:mV
;Include 文件定义 ;W]NT4p
include windows.inc Y$uXBTR`y/
include user32.inc 0kS[`a(}J
includelib user32.lib M;OY+|uA
include kernel32.inc Vh$~]>t:f
includelib kernel32.lib :BKY#uH~
;数据段 +8Yt91
.data :P#
szCaption db 'A MessageBox!',0 -BfZ P5
szText db 'Hello,world!',0 .%_scNP
;代码段 $%ZEP>]
.code X&nkc/erx
start: %Ez%pT0TQ#
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK O|m-Uz"+
invoke ExitProcess,NULL 3.U5Each-
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> zB/$*Hd
end start sJg-FVe2
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AWK u4bPj2N8I
BEGIN { print "Hello, world!" } ..V6U"/
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BASIC =;!C7VS
传统版BASIC(例如GWBASIC): V9z/yNo
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10 PRINT "Hello, world!" Pwf2dm$,+
20 END ^$f}s,09
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或在提示符输入: QE[ETv
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?"Hello, world!":END &MsnQP
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现代版BASIC(例如Quick BASIC): U4qp?g+:
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Print "Hello, world!" :$."x
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以下的语句在Quick BASIC中同样有效: L^3~gZ
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? "Hello,world!" "^VKs_U8o
%myg67u
S~0 mY}
m
BCPL Ta`=c0
GET "LIBHDR" ,2q LiE>
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LET START () BE o7<pI8\
$( A+w51Q
WRITES ("Hello, world!*N") SjV;&
1Z/
$) "& 'h\
cdVh_"[
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Befunge Q4\EI=4P]
"!dlrow olleH">v \&ra&3o
, "f/lm 2<
^_@ /{
Lo0
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Brainfuck s9svuFb
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C | YmQO#''
#include <stdio.h> <x@brXA
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int main(void) If>k~aL7I
{ ,0O9!^
printf("Hello, world!\n"); 'AU(WHf
return 0; e2CjZ" C
} :td6Mywl
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