“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。 C-y MWr
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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》。 Rn?JMM]
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以下是用不同语言写成的Hello World程序的几个例子: 9vV==A#
Ada 3&y-xZ u]
with Ada.Text_Io; use Ada.Text_Io; BEOPZ[Q|c
procedure Hello is hWy@?r.
begin +cH>'OXoB
Put_Line ("Hello, world!"); iAz0 A
end Hello; fmixWL7.Zg
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汇编语言 a^%)6E.[,
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x86 CPU,DOS,TASM
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MODEL SMALL VO0:4{-
IDEAL J9[7AiEd(/
STACK 100H osXEzr(
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DATASEG i%FC
lMF
HW DB 'Hello, world!$' MDF_Xr-hZ
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CODESEG }&vD(hX
MOV AX, @data 86{>X5 +
MOV DS, AX j,i9,oF6]
MOV DX, OFFSET HW vxZ'-&;t
MOV AH, 09H *:n7B\.
INT 21H f]r*;YEc4
MOV AX, 4C00H c]{}|2u
INT 21H jC'h54,Mr
END ]AYP\\Xi
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x86 CPU,GNU/Linux,NASM )NZH{G
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). v Z9OJrF
;Enter this into "hello.asm" then type: WK6,K92
;"nasm -f elf hello.asm" -zFJ)!/?
;"ld hello.o -o hello" 6Hnez @d
;"./hello" ?z.?(xZ 6
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section .data ;data section declaration 5!?5S$>
msg db 'Hello World!',0AH e6taQz@}
len equ $-msg ;string length "B{3q`(
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section .text ;code section declaration 23tX"e
global _start ;entry point (start of execution) _z#"BN
_start: mov edx,len ;string length ~3.*b%,
mov ecx,msg ;string start qKD
mov ebx,1 ;file handle: stdout vL@<l^`$0
mov eax,4 ;sys_write `0qjaC
int 80h ;kernel system call A1prYD
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mov ebx,0 ;return value 4v`/~a
mov eax,1 ;sys_exit xS 1|t};
int 80h ;kernel system call Odo)h
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x86 CPU,Windows,MASM32 7*PBJt\
.386 tBGLEeL/.
.model flat,stdcall `TPIc
option casemap:none U\P4ts
;Include 文件定义
e;`(*
include windows.inc I#2$CSJ
include user32.inc
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includelib user32.lib 486\a
include kernel32.inc X\m\yv}}
includelib kernel32.lib /F;2wT;
;数据段 &ww-t..
.data xfeE D^?
szCaption db 'A MessageBox!',0 W\~ie}D{
szText db 'Hello,world!',0 M)#9Q=<
;代码段 qob!AU|
.code HF*0
start: [P+kQBLpL
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK P4#i]7%
invoke ExitProcess,NULL 3Rb#!tx9
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 4MPy}yT*
end start ^y@
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AWK \oWpyT _
BEGIN { print "Hello, world!" } `D(V_WZ
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