“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。 NF+^
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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》。 |2w,Np-
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以下是用不同语言写成的Hello World程序的几个例子: HLm6BtE
Ada N9 @@n:JT
with Ada.Text_Io; use Ada.Text_Io; uLXMEx<^
procedure Hello is ^x(BZolkm
begin E-jL"H*
Put_Line ("Hello, world!"); v&6I\1
end Hello; gz8>uGx&V!
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汇编语言 0Snl_@s
W(U:D?e
x86 CPU,DOS,TASM S_?{<{
MODEL SMALL ZP75zeH
IDEAL {"hX_t
STACK 100H KY 085Fvs
# rnO=N8
DATASEG 5#kN<S!
HW DB 'Hello, world!$' *9.4AW~]X
x9S~ns+r
CODESEG L-Qc[L
MOV AX, @data s/#L?[YH
MOV DS, AX Xm,w.|dx
MOV DX, OFFSET HW 1KwUp0%&
MOV AH, 09H iV<4#aBg
INT 21H )fSO|4
MOV AX, 4C00H d7
|3A
INT 21H i i&kfy
END /J{
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z Ic%>?w
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x86 CPU,GNU/Linux,NASM
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;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). Yzo_ZvL
;Enter this into "hello.asm" then type: O#Y;s;)i"
;"nasm -f elf hello.asm" Q'-g+aN
;"ld hello.o -o hello" J3/2>N]/}
;"./hello" !F]7q]g
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section .data ;data section declaration z*,P^K 0T
msg db 'Hello World!',0AH 2^Y@e=^A
len equ $-msg ;string length AcC'hr.N+
I!\;NVhv
section .text ;code section declaration d@-s_gw
global _start ;entry point (start of execution) g Mhn\
_start: mov edx,len ;string length um.s:vj$
mov ecx,msg ;string start .CU~wB@h
mov ebx,1 ;file handle: stdout 7O)j]eeoL
mov eax,4 ;sys_write Y\#+-E
int 80h ;kernel system call ,]CZ(q9-
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mov ebx,0 ;return value ;yd[QT<I<
mov eax,1 ;sys_exit S#gIfb<D
int 80h ;kernel system call !l2=J/LJj
qU!xh)
}M_Yn0(3
x86 CPU,Windows,MASM32 #"PI%&
.386 *WS'C}T
.model flat,stdcall 4n1-@qTPF~
option casemap:none 4q%hn3\
;Include 文件定义 o0SQJ1.a$
include windows.inc #Z%?lx"Q0
include user32.inc "`A@_;At`
includelib user32.lib @log=^
include kernel32.inc _Nze="Pt
includelib kernel32.lib 8Ter]0M&
;数据段 Hz A+Oi
.data &+"-'7
szCaption db 'A MessageBox!',0 -TL `nGF
szText db 'Hello,world!',0 "Yh[-[,
;代码段 ?r< F/$/
.code ~n)gP9Hv
start: WsHC%+\'
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK P?QVT;]
invoke ExitProcess,NULL a+wc"RQ
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;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> x !)[l;
end start "v%|&@
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AWK Ed&;d+NM
BEGIN { print "Hello, world!" } k2]Q~
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Xgq-r $O2X
BASIC z>n<+tso
传统版BASIC(例如GWBASIC): ZAKNyA2
ykq9]Xqhv
10 PRINT "Hello, world!" 0W}iKT[Z
20 END Y@&1[Z
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或在提示符输入: >J!J:
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?"Hello, world!":END '3n?1x
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现代版BASIC(例如Quick BASIC): W.nQYH
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Print "Hello, world!" 6x6xv:\
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以下的语句在Quick BASIC中同样有效: Z:TW{:lrI
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? "Hello,world!" oh>X/uj
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WziX1%0$n
BCPL gOk<pRcTb=
GET "LIBHDR" %Fb4
kaKV{;UM
LET START () BE [ij8h,[~]
$( Q#wl1P
WRITES ("Hello, world!*N") S`N_},
$) 2!UNFv#=$
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Befunge Ds}ctL{6"
"!dlrow olleH">v T[$! ^WT
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^_@ O(P
,!
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Brainfuck x+mfQcSD&
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< J}c`\4gD
+++++++++++++++.>.+++.------.--------.>+.>. 9!aQ@ J^
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C "0ITW46n
#include <stdio.h> bU(H2Fv
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6A]T
int main(void) !a(#G7zA
{ wK0= I\WN9
printf("Hello, world!\n"); n\U3f M>N
return 0; mAI<