“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。 >~^mIu_BH
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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》。 c*M)DO`y;h
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以下是用不同语言写成的Hello World程序的几个例子: }K#&5E
Ada ;*j6d3E
with Ada.Text_Io; use Ada.Text_Io; @]y{M;
procedure Hello is Vx\#+)4
begin :)
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Put_Line ("Hello, world!"); f/IRO33
end Hello; =@ L5
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汇编语言 Fb\2df{@
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x86 CPU,DOS,TASM n{qw ]/
MODEL SMALL w|n?m
IDEAL V5hlG =V
STACK 100H >r4Y\"/j
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DATASEG T`RQUJO
HW DB 'Hello, world!$' +n8I(l=
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3
CODESEG Vbqm]2o&
MOV AX, @data gqHH Hh
MOV DS, AX &]"_pc/>m
MOV DX, OFFSET HW !w;A=
MOV AH, 09H v#<+n{B
INT 21H MSYLkQ}_b
MOV AX, 4C00H <=y58O]x
INT 21H yw3U"/yw
END tUAY]BJ*s
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x86 CPU,GNU/Linux,NASM pRk'GR]`
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). v^lm8/}NO
;Enter this into "hello.asm" then type: Y(G*Yi?;
;"nasm -f elf hello.asm" d)17r\*>I
;"ld hello.o -o hello" 5f^`4pT
;"./hello" 1vR#FE?
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section .data ;data section declaration GD6'R"tJ
msg db 'Hello World!',0AH ^&G O4u
len equ $-msg ;string length x"C93ft[
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section .text ;code section declaration g)r,q&*
global _start ;entry point (start of execution) )/N Xh'
_start: mov edx,len ;string length J1y2Qw$G
mov ecx,msg ;string start WX[dM
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mov ebx,1 ;file handle: stdout 1WA""yb
mov eax,4 ;sys_write b09#+CH?
int 80h ;kernel system call |\r\i&|g1
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mov ebx,0 ;return value H@&"M%
mov eax,1 ;sys_exit >*Qk~kv<%
int 80h ;kernel system call a\.O L}"
yn ?U7`V
ywsz"/=@
x86 CPU,Windows,MASM32 Lw2YP[CR
.386 E/ed0'|m
.model flat,stdcall ~BYEeUo;%v
option casemap:none 0wE8GmG
;Include 文件定义 cdU
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include windows.inc BKP!+V/
include user32.inc 2QuypVC ]
includelib user32.lib G3?a~n^b
include kernel32.inc A&_i]o
includelib kernel32.lib ;Wrd=)Ka
;数据段 1
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.data {*]=qSz
szCaption db 'A MessageBox!',0 gu.))3D9
szText db 'Hello,world!',0 { G>+.
;代码段 },QFyT
.code CPCB!8-5
start: ^&w'`-ra
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK &B5Rzz-'
invoke ExitProcess,NULL fS$Yl~-m?
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> V{aIhH>P
end start }y=n#%|i.
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BEGIN { print "Hello, world!" }
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BASIC FVLA^$5c
传统版BASIC(例如GWBASIC): x?k |i}Q
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10 PRINT "Hello, world!" Z YO/'YW
20 END _q!ck0_
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或在提示符输入: x: wq"X
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?"Hello, world!":END U?m?8vhR6(
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现代版BASIC(例如Quick BASIC): 'A@Oia1;{
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Print "Hello, world!" g8@i_
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以下的语句在Quick BASIC中同样有效: ).#D:eO[~
K0!#l Br
? "Hello,world!" NZ? =pfK\s
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BCPL 5suSR;8
GET "LIBHDR" k/rkJ|i+p
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LET START () BE HE.Dl7{
$( bX1! fa
WRITES ("Hello, world!*N") #[rFep
$) ,T>2zSk
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Befunge vP;tgW9Qk
"!dlrow olleH">v j3'/jk]\
, HDG"a&$
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Brainfuck \}&w/.T
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< dufHd
+++++++++++++++.>.+++.------.--------.>+.>. <5L` d}
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C |&*rSp2iH
#include <stdio.h> $f-pLF+x
N9hWx()v
int main(void) pNme jz:
{ E$fy*enON
printf("Hello, world!\n"); S^_yiV
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return 0; lk'jBl%
} fO|u(e
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C++ 78A4n C
#include <iostream> 6h"?3w
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int main() \}(-9dr
{ )u:8Pv
std::cout << "Hello, world!" << std::endl; b8Ad*f\
return 0; }{PtQc6RL!
} ~oyPmIcb
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