“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。 q 4V7
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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》。 [e1S^pI
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以下是用不同语言写成的Hello World程序的几个例子: \e`~i@) ~Z
Ada o=nsy]'&
with Ada.Text_Io; use Ada.Text_Io; ^FnfJ:
procedure Hello is Hk|0HL
begin %TsPyiYl
Put_Line ("Hello, world!"); _D|^.)=U|
end Hello; ] Eh}L
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汇编语言 z)uuxNv[R
o-o'z'9
x86 CPU,DOS,TASM )Z %T27r,^
MODEL SMALL pJ
?~fp
IDEAL oTT7M`P3h
STACK 100H 7==f\%,
mA{~PpSb
DATASEG i<(Xr
HW DB 'Hello, world!$' YZ+RWu9K
san,|yrMn
CODESEG hI( SOsKs
MOV AX, @data c*R/]Dn
MOV DS, AX n3sUbs;
MOV DX, OFFSET HW <EST?.@~+
MOV AH, 09H QFIL)'K
INT 21H oP4GEr
MOV AX, 4C00H SvR7eC
INT 21H -J^(eog[6
END Jnv@.
1 1cWy+8D
B7z -7&TE
x86 CPU,GNU/Linux,NASM CSCN['x
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). }ZqW@-
;Enter this into "hello.asm" then type: ]@Sj`J[fd
;"nasm -f elf hello.asm" `g,8-
;"ld hello.o -o hello" ,<2DLp%%D
;"./hello" Dnc<sd;
#h@J=Ki
section .data ;data section declaration Q#EP|
msg db 'Hello World!',0AH A7c/N=Cp^
len equ $-msg ;string length Xj*vh
m%i
q=lAb\i
section .text ;code section declaration CX m+)a-L
global _start ;entry point (start of execution) W}|'#nR
_start: mov edx,len ;string length rL5z]RY
mov ecx,msg ;string start UswZG^Wh
mov ebx,1 ;file handle: stdout CwJDmz\tk
mov eax,4 ;sys_write !*`-iQo&
int 80h ;kernel system call 'L{8@gqi
8KH\`5<
mov ebx,0 ;return value Q#IG;
mov eax,1 ;sys_exit 8 B**8yg.
int 80h ;kernel system call 21(p|`X
`|Or{ih
LbtX0^
x86 CPU,Windows,MASM32 [NFNzwUB
.386 a[2vjFf#C
.model flat,stdcall |T{C,"9y
option casemap:none &5L<i3BX
;Include 文件定义 rcGb[=B f
include windows.inc kapC%/6"
include user32.inc smm]6
includelib user32.lib RyRpl*^
include kernel32.inc C4}*)a
includelib kernel32.lib W0=O+0$^
;数据段 BYKoel
.data R=Tqj,6
szCaption db 'A MessageBox!',0 3<F </
szText db 'Hello,world!',0 *|_"W+JC
;代码段 IuZ) [*W
.code fo4.JyBk
start: n$[f94d=
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK 6;
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invoke ExitProcess,NULL :{q"G#
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> O+RP3ox"
end start
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