“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。 Lqxhy s
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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》。 nZnqXclzxn
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以下是用不同语言写成的Hello World程序的几个例子: \{ | GK
Ada
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with Ada.Text_Io; use Ada.Text_Io; eb`3'&zV&)
procedure Hello is &c!6e<o[p
begin vC>2%Zgf-
Put_Line ("Hello, world!"); W7A!QS
end Hello; Ox#vW6;)
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汇编语言 (${:5W
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x86 CPU,DOS,TASM k^|z.$+
MODEL SMALL ]@Y!,bw&
IDEAL IrZ\;!NK
STACK 100H <QvVPE}z
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DATASEG 67&IaDts
HW DB 'Hello, world!$' I)1ih
Mj1f;$
CODESEG :(ql=+vDb4
MOV AX, @data _+9i
MOV DS, AX |U1 [R\X
MOV DX, OFFSET HW "{~FEx4
MOV AH, 09H ]cP%d-x}
INT 21H zAM9%W2v_
MOV AX, 4C00H *w0|`[P+h
INT 21H *(5;5r
END @!oN]0`F;
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x86 CPU,GNU/Linux,NASM i[9gcL"
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). @,1_CqV
;Enter this into "hello.asm" then type: %T>@Ldt
;"nasm -f elf hello.asm" &iw,||#
;"ld hello.o -o hello" HdtGyh6X0
;"./hello" ,nL~?h-Zh
j[i*;0) |
section .data ;data section declaration Sak^J.~G[
msg db 'Hello World!',0AH |MKR&%Na
len equ $-msg ;string length lHM}
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0~ nCT&V
section .text ;code section declaration Z<>gx m<
global _start ;entry point (start of execution) 7r?,wM
_start: mov edx,len ;string length Y>aVnixx<
mov ecx,msg ;string start kM4z
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mov ebx,1 ;file handle: stdout e@VJ-s
mov eax,4 ;sys_write |DW^bv
int 80h ;kernel system call 2~/`L=L
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mov ebx,0 ;return value SujEF`"
mov eax,1 ;sys_exit VtzZ1/JE
int 80h ;kernel system call &TRKd)w d
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x86 CPU,Windows,MASM32 9;XbyA]
.386 MVzj7~+
.model flat,stdcall p_BG#dRM
option casemap:none ^PFiO 12
;Include 文件定义 V C VqUCc
include windows.inc R5QW4i9
include user32.inc 2|\mBP`ok
includelib user32.lib I`XOvSO
include kernel32.inc -"ZNkC=
includelib kernel32.lib mY"Dw^)
;数据段 6{i0i9Tb
.data u,iiS4'Ze
szCaption db 'A MessageBox!',0 "JmbYb#Z
szText db 'Hello,world!',0 yxx_%9 X
;代码段 4w%hvJ
.code Bn8&~
start: !lzj.|7=1
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK "24d:vf\
invoke ExitProcess,NULL 6[XaIco=C
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> {BM:c$3@j
end start VB |k
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b/\O;o}]
AWK An(gHi;1$
BEGIN { print "Hello, world!" } v,ecNuy*d
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BASIC Z\C"/j<y
传统版BASIC(例如GWBASIC): a9lYX*:
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10 PRINT "Hello, world!" ]b}3f<
20 END < q(i(%
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或在提示符输入: }mp`!7?>O
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?"Hello, world!":END *vBhd2HO
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现代版BASIC(例如Quick BASIC): J%ws-A?6rN
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Print "Hello, world!" kKbbsB
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以下的语句在Quick BASIC中同样有效: `4@`G:6BL
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? "Hello,world!" |U1u:=[
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BCPL !#]kzS0
GET "LIBHDR" EX<1hAw
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LET START () BE ]igCV
$( "e\73?P
WRITES ("Hello, world!*N") O+XQP!T
$) oKSW:A
$(J)F-DB i
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Befunge _kOuD}_|
"!dlrow olleH">v i-0AcN./p
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