“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。 m LPQ5`_
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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》。 B@e,3:
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以下是用不同语言写成的Hello World程序的几个例子: @jN!j*Y H
Ada |;6FhDW+'
with Ada.Text_Io; use Ada.Text_Io; ?0hk~8c
procedure Hello is
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begin l Vo](#W
Put_Line ("Hello, world!"); ]o$Kh$~5
end Hello; FT/H~|Z>
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汇编语言 8\!0yM#yK
Q/\
<r G4
x86 CPU,DOS,TASM IpGq_TU
MODEL SMALL BRG1/f
d
IDEAL %Gl, V5z&
STACK 100H ;"!dq)
44f8Hc1g
DATASEG y1cAw
HW DB 'Hello, world!$' 6=Kl[U0Y
RZjTUMAz4
CODESEG D(Zux8l
MOV AX, @data _ D1bR7
MOV DS, AX KArf:d
MOV DX, OFFSET HW M
ioS
MOV AH, 09H PkF
B.
INT 21H QB#f'X
MOV AX, 4C00H :35J<oG
INT 21H [esjR`u
END ?(*KQ#d
@7 &rDZ
jkQv cU
x86 CPU,GNU/Linux,NASM 5b0Ipg
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). )AXTi4MNp
;Enter this into "hello.asm" then type: ;T/W7=4CZ
;"nasm -f elf hello.asm" .=3Sm%
;"ld hello.o -o hello" -0YS$v%au>
;"./hello" 0@C`QW%m
~bL(mq
section .data ;data section declaration 8? W\kf$
msg db 'Hello World!',0AH !9356) cV
len equ $-msg ;string length "^;'.~@e8
!ceuljd]
section .text ;code section declaration :(} {uG
global _start ;entry point (start of execution) }di)4=U9
_start: mov edx,len ;string length QKCc5
mov ecx,msg ;string start u Y V=
mov ebx,1 ;file handle: stdout j,/OzVm9
mov eax,4 ;sys_write 7`6n]4e
int 80h ;kernel system call J^hj
R%H
D`3}j
mov ebx,0 ;return value vpvPRwJ
mov eax,1 ;sys_exit aN).G1
int 80h ;kernel system call _MR|(mV
@za?<G>!'e
d~g
x86 CPU,Windows,MASM32 [Rs5hO
.386 j8M}*1
.model flat,stdcall -x_b^)x~b7
option casemap:none RSG4A>%!mI
;Include 文件定义 bnWIB+%_
include windows.inc ^>.?kh9z
include user32.inc MM|&B`v@;
includelib user32.lib Q
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include kernel32.inc @'?<92A
includelib kernel32.lib _T6WA&;8
;数据段 [`=|^2n?
.data igOjlg_Q
szCaption db 'A MessageBox!',0 L=Dd`
szText db 'Hello,world!',0 5Jp@n .
;代码段 28d:
.code .oO_x>
start: =9i:R!,W
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK x/~V
ZO
invoke ExitProcess,NULL ]Q-ON&/
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> #PVgx9T=_
end start IJD'0/R'c
Nj %!N
w)&] k#r
AWK |D$U{5}Mv
BEGIN { print "Hello, world!" } ZUQ1\Iw
~ I]kY%
H_ .@{8I
BASIC 9:!n'mn
传统版BASIC(例如GWBASIC): (5_l7hWY
Fq&@dxN3
10 PRINT "Hello, world!" l|%7)2TyG)
20 END PD|I3qv~
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或在提示符输入: 6G/)q8'G
?WG9}R[qE/
?"Hello, world!":END qe"5&