“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。 /tG[pg{[
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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》。 j,79G^/YG
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以下是用不同语言写成的Hello World程序的几个例子: 6hO]eS
Ada WB.w3w[f
with Ada.Text_Io; use Ada.Text_Io; ce<88dL
procedure Hello is s$Vz1B
begin ZA7b;{o [
Put_Line ("Hello, world!"); >sGiDK @
end Hello; "rnVPHnQR
gl~9|$ivj>
r'<!wp@
汇编语言 ,UNnz&H+f
NtG^t}V
x86 CPU,DOS,TASM `D? &)Y
MODEL SMALL #G]g
IDEAL O%1uBc
STACK 100H $}t;c62
tx$`1KA
DATASEG pG^>y0
HW DB 'Hello, world!$' uC|bC#;
%$&_!
CODESEG WS.lDMYE7
MOV AX, @data QKI g5I-
MOV DS, AX MmQk@~
MOV DX, OFFSET HW >ra)4huZ
MOV AH, 09H gs(ZJO1 /L
INT 21H 4C }#lW9
MOV AX, 4C00H gn:&akg
INT 21H P>hR${KE
END Hyb_>n
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x86 CPU,GNU/Linux,NASM 5i-VnG
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). .|i/
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;Enter this into "hello.asm" then type: ig ^x%!;
;"nasm -f elf hello.asm" r8Z.}<j
;"ld hello.o -o hello" UmL Boy&*
;"./hello" M%bD7naBq
r<[G~n
section .data ;data section declaration |~B` [p]5H
msg db 'Hello World!',0AH hz+c]K
len equ $-msg ;string length S|O#KE
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section .text ;code section declaration D$Ao-6QE
W
global _start ;entry point (start of execution) ;0o%
hx
_start: mov edx,len ;string length fwi
-
mov ecx,msg ;string start m#^;V
mov ebx,1 ;file handle: stdout c6cB
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mov eax,4 ;sys_write z:;yx
int 80h ;kernel system call t]hfq~Ft
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mov ebx,0 ;return value t8ORfO+
mov eax,1 ;sys_exit K(AZD&D
int 80h ;kernel system call Z3f}'vr
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riQ0'-p
x86 CPU,Windows,MASM32 {$I1(DYN
.386 GO3KKuQ=
.model flat,stdcall qS?^(Vt|R
option casemap:none 5nXmaj
;Include 文件定义 t4UL|fI
include windows.inc h\4enu9[RL
include user32.inc 8M,$|\U
includelib user32.lib L\q-Z..
include kernel32.inc
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includelib kernel32.lib i7mo89S
;数据段 QsBC[7<jd-
.data T~
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szCaption db 'A MessageBox!',0 ^@)*voP#G
szText db 'Hello,world!',0 M%OUkcWCk
;代码段 ZyV^d3F@$
.code 13A~."b
start: Z fd `Fu
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK v,Z?pYYo
invoke ExitProcess,NULL )3ZkKv;zY
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> a28`)17z
end start [&)*jc16
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SP;1XXlL
AWK aWY#gI{
BEGIN { print "Hello, world!" } k{ulu
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BASIC A#gy[.Bb
传统版BASIC(例如GWBASIC): eC@b-q
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10 PRINT "Hello, world!" v?l*jr1-2
20 END fs2y$HN
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或在提示符输入: 1]&{6y
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?"Hello, world!":END mOJ-M@ME
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现代版BASIC(例如Quick BASIC): 19i=kdH
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Print "Hello, world!" _sQhD i
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以下的语句在Quick BASIC中同样有效: qmtH0I7)
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? "Hello,world!" f%yNq6l
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eC_i]q&o|
BCPL cA~bH 6
GET "LIBHDR" l - ~PX
zor
LET START () BE @&GY5<&b
$( PJAM_K;
WRITES ("Hello, world!*N") e"ClG/M_XS
$) T3t
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Befunge "Mh}n-oju
"!dlrow olleH">v 9u>X,2gUR
, oN,9#*PVL
^_@ !T.yv5ge'
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{( Ba
Brainfuck QEP|%$:i
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C B-wF1!Jv
#include <stdio.h> L(}/W~En
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;^
int main(void) " ,]A.,
{ j|VX6U
printf("Hello, world!\n"); j3fq}>=
return 0; B %
} C\*0621
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