“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。 U$-FQRM4K
yn7n
将Hello World程序作为第一个学写的程序,现在已经成为一种传统。该程序最早出现在由Brian Kernighan和Dennis Ritchie写的计算机程序设计教程《C语言程序设计》。 0w c+<CUW
h rZ\ O?j
以下是用不同语言写成的Hello World程序的几个例子: Qdtfi1_Y1
Ada ";GLX%C!{@
with Ada.Text_Io; use Ada.Text_Io; 9eV@v
procedure Hello is = 7jkW (Q
begin oc15!M3$
Put_Line ("Hello, world!"); D3jP hPy.
end Hello; UH)A n:9
Z(V4"x7F
pIh@!C
汇编语言 } wiq?dr
BKGwi2]Ry
x86 CPU,DOS,TASM 2Aff3]-:Gd
MODEL SMALL <|.M]]}j
IDEAL kQj8;LU
STACK 100H H6~QSe0l
alq>|,\x
DATASEG I5-/KVWb
HW DB 'Hello, world!$' C[[z3tn
q-uYfXZ{j
CODESEG y(q1~73s
MOV AX, @data F[J;u/Z
MOV DS, AX 7%o\O{,U
MOV DX, OFFSET HW -
@
MOV AH, 09H =EIsqk^*
INT 21H Hiw{1E:rW
MOV AX, 4C00H OnD+/I
INT 21H ;ymUMQ%;/
END h'N,oDB)
]o_ Ps|
haY.rH]z
x86 CPU,GNU/Linux,NASM D L$P
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). ."MBKyg6
;Enter this into "hello.asm" then type: ]qrO"X=
;"nasm -f elf hello.asm" )[/+j"F
;"ld hello.o -o hello" ov?>ALRg
;"./hello" 7=JiL=
:FK(*BUh
section .data ;data section declaration V+E2nJ
msg db 'Hello World!',0AH ost~<4~
len equ $-msg ;string length |vGz
1jLV
D
F0~A
section .text ;code section declaration 2#sE\D
global _start ;entry point (start of execution) p[W8XX
_start: mov edx,len ;string length 1N2:4|woe
mov ecx,msg ;string start d`v]+HK
mov ebx,1 ;file handle: stdout ty(F;M(
mov eax,4 ;sys_write cnI!}Bu
int 80h ;kernel system call {lqnn n3
\b'
<q
mov ebx,0 ;return value q~a6ES_lA
mov eax,1 ;sys_exit c.NAUe_3
int 80h ;kernel system call '!Q[+@$
5<&<61[A
8pPAEf
x86 CPU,Windows,MASM32 qG~O]($
.386 V-t!
.model flat,stdcall d]+g3oy
`
option casemap:none 3{
`fT5]U
;Include 文件定义 u0N1+-6kr+
include windows.inc sfx:j~bsL
include user32.inc _<xU"8b"5
includelib user32.lib xH*OEzN
include kernel32.inc Ff.gRx
includelib kernel32.lib /\C9FGS
;数据段 vk{dL'
.data &x\u.wIa
szCaption db 'A MessageBox!',0 {GZHD^Ce
szText db 'Hello,world!',0 3vmZB2QG
;代码段 MT a.Ubs
.code
_ 57m] ;&
start: Y]ZOvA5W
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK t R*JM$T
invoke ExitProcess,NULL Z~$fTW6g
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> zX|CW;
end start F!N;4J5u
e PlEd'Z
)PR{ia64;<
AWK Z1*y$=D?3[
BEGIN { print "Hello, world!" } E5.)ro=$
/J1O{L
C
<]rY
BASIC 0;o`7f
传统版BASIC(例如GWBASIC): H<"{wUPT0
eBG7]u,Q
10 PRINT "Hello, world!" O+c@B}[!
20 END m
&s0Ub
.~C*7_
或在提示符输入: |VTm5.23
f |aO9w
?"Hello, world!":END / [:@j+n\
^-mz!{
现代版BASIC(例如Quick BASIC): =|=9\3po
X8F _Mb*
Print "Hello, world!" `[7&tOvSk
/1t(e._
以下的语句在Quick BASIC中同样有效: v?5Xx{ym
0l{').!_
? "Hello,world!" 7w YSP&$
j2g#t
}h EBX:-
BCPL V/<dHOfR\
GET "LIBHDR" j[9xF<I
wvsTP32]
LET START () BE %<:?{<~wH9
$( Z=4Krfn
WRITES ("Hello, world!*N") ,.G6c=pZ
$) `dMl5b
1z0&+ C3z
YtE V8w_$
Befunge d{I|4h
"!dlrow olleH">v ?}lgwKBHl;
, n SmYa7
^_@ tk2B\}6
H+\rCefba
d8/lEmv[
Brainfuck SO3WOR`3
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< hPP+lqY[
+++++++++++++++.>.+++.------.--------.>+.>. *ofK|r
K-(,,wS
ok2$ p
C 9^)ochY3
#include <stdio.h> s>E4.0[I%
|l`X]dsfQ
int main(void) t&eY+3y,T
{ zH}u9IR3`
printf("Hello, world!\n"); \^w=T*
return 0; +7^{T:^ht
} }|&