“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。 3sC:jIp
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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》。 ^!@*P,'I
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以下是用不同语言写成的Hello World程序的几个例子: c2b6B.4
Ada _:,.yRez
with Ada.Text_Io; use Ada.Text_Io; w yD%x(
procedure Hello is I#l;~a<9z
begin >_#)3K1y8
Put_Line ("Hello, world!"); g.*&BXZi
end Hello; {a4xF2
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汇编语言 5 LMj!)3
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x86 CPU,DOS,TASM oYq,u@oM
MODEL SMALL sQ(1/"gb
IDEAL lS{4dvr?w
STACK 100H lV7IHX1P
4 ?2g&B\
DATASEG n2na9dX)w
HW DB 'Hello, world!$' [a D:A
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;w[s
CODESEG Z}f^qc+
MOV AX, @data C5B=NAc
MOV DS, AX Dh8(HiXf:
MOV DX, OFFSET HW -M`D>
MOV AH, 09H CveWl$T12
INT 21H /Hk07:"c
MOV AX, 4C00H ;E2kT
GT
INT 21H {_ 6t4h}
END =dn1}
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x86 CPU,GNU/Linux,NASM ho|8U
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). '^lUL) R
;Enter this into "hello.asm" then type: `wV|q~
;"nasm -f elf hello.asm" +QupM
;"ld hello.o -o hello" z6}Pj>1
;"./hello" %g-0O#8}
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section .data ;data section declaration ;x RjQR
msg db 'Hello World!',0AH Z]e4pR6!
len equ $-msg ;string length ~GYpat
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section .text ;code section declaration |)';CBb
global _start ;entry point (start of execution) \v s%U}IrO
_start: mov edx,len ;string length T"A^[r*
mov ecx,msg ;string start t!l/` e%J
mov ebx,1 ;file handle: stdout <!hpfTz*
mov eax,4 ;sys_write <dJIq"){
int 80h ;kernel system call CMKhS,,o
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mov ebx,0 ;return value +QQYPEx+
mov eax,1 ;sys_exit 1[[TB .xF
int 80h ;kernel system call hC|KH}aCR)
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x86 CPU,Windows,MASM32 IF$^0q
.386 Yg|l?d"
.model flat,stdcall j`+0.Zlq
option casemap:none 1O- E],
;Include 文件定义 ^VC7C~NZ!M
include windows.inc ?bn;{c;E
include user32.inc CElPU`J,\[
includelib user32.lib /W? z0tk`
include kernel32.inc &KOO&,
includelib kernel32.lib Wu]/(F
;数据段 a]{uZGn@i
.data \/X{n*Hw?
szCaption db 'A MessageBox!',0 1wU=WE(kKZ
szText db 'Hello,world!',0 f^ywW[dF
;代码段 /H.(d 4C
.code \ p1K(H
start: {4o\S
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK g8rp|MOH
invoke ExitProcess,NULL Kyyih|{
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 3[,wMy"
end start K]%N-F>r
\kfcv
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AWK oMz/sL'u
BEGIN { print "Hello, world!" } 5_PWGaQa
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BASIC e2qpJ4i
传统版BASIC(例如GWBASIC): .<0=a|IAz
9PUa?Bc`=
10 PRINT "Hello, world!" v hR twi
20 END K`,nW6\
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或在提示符输入: V>1D1
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?"Hello, world!":END
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现代版BASIC(例如Quick BASIC): rL.<Z@-
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