“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。 \}~s2Y5j
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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》。 hky;CD~$
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以下是用不同语言写成的Hello World程序的几个例子: d*oUfiW
Ada zE)~0v4
with Ada.Text_Io; use Ada.Text_Io; QZX~T|Ckv
procedure Hello is sz--27es
begin En&5)c+js4
Put_Line ("Hello, world!"); g~BoFc.V2~
end Hello; N)S!7%ne
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汇编语言 ;f,c't@w
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x86 CPU,DOS,TASM x f4{r+
MODEL SMALL 5'w^@Rs5
IDEAL 5j0{p$'9
STACK 100H 9'x)M?{8
!;6Jng%
DATASEG aZKOY
HW DB 'Hello, world!$' q8:{Nk
CC;! <km
CODESEG Qp2I[Ioz3
MOV AX, @data NNG}M(/V
MOV DS, AX okq[ o90
MOV DX, OFFSET HW BbJkdt7
MOV AH, 09H ^T4Ay=~{
INT 21H 0"xPX#Cvj
MOV AX, 4C00H o%M<-l"!/
INT 21H tn/T6C^)
END ,D80/2U^
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x86 CPU,GNU/Linux,NASM ned2lC&'d>
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). [A~G-
;Enter this into "hello.asm" then type: 3+OsjZ
;"nasm -f elf hello.asm" m4ApHM2
;"ld hello.o -o hello" 3$M3Q]z
;"./hello" m.%`4L^`T
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section .data ;data section declaration ^9"KTZc-*
msg db 'Hello World!',0AH g?/XZ5$a5
len equ $-msg ;string length 83]PA<R
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section .text ;code section declaration I#A2)V0P)
global _start ;entry point (start of execution) ,ul5,ygA
_start: mov edx,len ;string length o96:4j4
mov ecx,msg ;string start Ef7:y|?
mov ebx,1 ;file handle: stdout >kY p%r6
mov eax,4 ;sys_write "/x_>ui1F
int 80h ;kernel system call 7h<> k*E)
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mov ebx,0 ;return value )ctr"&-
mov eax,1 ;sys_exit Jj"HpK>[
int 80h ;kernel system call J?712=9
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lxb 8xY
x86 CPU,Windows,MASM32 g@nk.aRw
.386 ~a+NJ6e1
.model flat,stdcall \SYvD y]
option casemap:none }Zl"9A#K
;Include 文件定义 -Wo15O"
include windows.inc a5wDm
include user32.inc F&@ |M(
includelib user32.lib o42`z>~
include kernel32.inc tEhr
includelib kernel32.lib 3o8\/-*<
;数据段 C|e+0aW
.data $B _Nc*_e
szCaption db 'A MessageBox!',0 +l\<?
szText db 'Hello,world!',0 f$D@*33ft
;代码段 Gt^d;7x]
.code @FX{M..
start: h`?k.{})M
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK >[3X]n,0
invoke ExitProcess,NULL ,{<Fz%
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> nxRwWj57
end start \graMu}-
fi=?n{e'
T\3 [F%?
AWK `jW4H$D
BEGIN { print "Hello, world!" } 8R/
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BASIC ?`. XK}
传统版BASIC(例如GWBASIC): `p|[rS>
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10 PRINT "Hello, world!" ZLJNw0!=|t
20 END NV~vuC
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或在提示符输入: jsWX 6(=
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?"Hello, world!":END BTs0o&}e
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现代版BASIC(例如Quick BASIC): @XBH.A^7r
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Print "Hello, world!" ewQe/Fq
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以下的语句在Quick BASIC中同样有效: G+C}<S}
5mIXyg 0:
? "Hello,world!" Bm<^rhJ9
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