“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。 )=:gO`"D
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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》。 5IsRIz[`TK
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以下是用不同语言写成的Hello World程序的几个例子: <.N337!
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with Ada.Text_Io; use Ada.Text_Io; M
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procedure Hello is 2!y %nkO*
begin }p <p(
Put_Line ("Hello, world!"); +I9+L6>UR
end Hello; ':[:12y[
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汇编语言 pEn3:.l<
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x86 CPU,DOS,TASM WL6p+sN'
MODEL SMALL +1]xmnts
IDEAL <"8<<
STACK 100H eT4+O5t
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DATASEG , id`=L=
HW DB 'Hello, world!$' 7H=^~J
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CODESEG =q4QBAW
MOV AX, @data vA(')"DDT
MOV DS, AX kV mJG#
MOV DX, OFFSET HW Z\)emps
MOV AH, 09H jxt^d
INT 21H VHUOI64*
MOV AX, 4C00H 'h:[[D%H`
INT 21H U_/<tWl\[3
END _1?
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x86 CPU,GNU/Linux,NASM @uWPo2
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). JuD$CHg;#
;Enter this into "hello.asm" then type: [)ybPIv]
;"nasm -f elf hello.asm" &7gE=E(M
;"ld hello.o -o hello" :2\H>^uV
;"./hello" u\]aUP
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section .data ;data section declaration BUozpqN}
msg db 'Hello World!',0AH YnCWmlC
len equ $-msg ;string length DW,fh8 w
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section .text ;code section declaration BWz7m9T
global _start ;entry point (start of execution) IIW6;jS
_start: mov edx,len ;string length 1 ^k#g,
mov ecx,msg ;string start ;h
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mov ebx,1 ;file handle: stdout dF-d
mov eax,4 ;sys_write 'za4c4b*u
int 80h ;kernel system call NVF gRJ&
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mov ebx,0 ;return value <<Fk[qMA
mov eax,1 ;sys_exit O0lQ1<=
int 80h ;kernel system call SAa
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x86 CPU,Windows,MASM32 >H,t^i}@
.386 in^Rf`
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.model flat,stdcall 6
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option casemap:none dB^')-wA
;Include 文件定义 -ty_<m]
include windows.inc 9bpY>ze
include user32.inc 7;_./c_@
includelib user32.lib <( 0TK5
include kernel32.inc &f\ng{
includelib kernel32.lib Q\>Kd
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;数据段 |VC/(A
.data b~Qd9Nf
szCaption db 'A MessageBox!',0 05<MsxB"w
szText db 'Hello,world!',0 u.}z}'-
;代码段 ^PCshb##
.code )eFq0+6*)
start: a*8^M\>m4
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK *d,u)l :S
invoke ExitProcess,NULL 9tnW:Nw~
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> TT(dCHft
end start "~f=7
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BEGIN { print "Hello, world!" } O1nfz> L`
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BASIC hb>,\46}
传统版BASIC(例如GWBASIC): y`~[R7E
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10 PRINT "Hello, world!" ypuW}H%`
20 END $=j}JX}z
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或在提示符输入: O; qerE?i`
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?"Hello, world!":END B6gSt3w.
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现代版BASIC(例如Quick BASIC): ,qgph^C
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Print "Hello, world!" N1RZ
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以下的语句在Quick BASIC中同样有效: 4Lx#5}P
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? "Hello,world!" m~fA=#l
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BCPL zR'lQ<u
GET "LIBHDR" ,y[wS5li
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LET START () BE :QnN7&j|(w
$( ?~e 8:/@
WRITES ("Hello, world!*N") Qa nE]
$) d/8I&{.
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Befunge F/\w4T
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