“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。 ^%pM$3ov
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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》。 cy-Bhk0H
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以下是用不同语言写成的Hello World程序的几个例子: $Q cr
Ada i-`n5,
with Ada.Text_Io; use Ada.Text_Io; }^np
procedure Hello is "]M]pR/j
begin W{!GL
Put_Line ("Hello, world!"); N1O.U"L;
end Hello; 1IRlFC
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汇编语言 8NRc+@f|m
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x86 CPU,DOS,TASM tuF
hPqe {
MODEL SMALL rL/e
IDEAL - s,M+Q(<
STACK 100H QXcSDJ
VaIFE~>E&
DATASEG "A6T'nOP
HW DB 'Hello, world!$' wtY*{m2
9j;L-
CODESEG W+C@(}pt
MOV AX, @data x!08FL)
MOV DS, AX }Ra'`;D$
MOV DX, OFFSET HW )d\u_m W^
MOV AH, 09H y(!YN7_A
INT 21H ?!:$Z4G
MOV AX, 4C00H 9svn B@
INT 21H >K2Md*[P3q
END 1b,,uI_
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x86 CPU,GNU/Linux,NASM lo%:$2*'p
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). 0~5'O[NhF
;Enter this into "hello.asm" then type: =&J7
'nDP
;"nasm -f elf hello.asm" <{"]&bl
;"ld hello.o -o hello" ;;2Yfn'`9
;"./hello" _ZnVQ,zY
Sj$XRkbj:
section .data ;data section declaration oTPPYi[r
msg db 'Hello World!',0AH fg mIx
len equ $-msg ;string length f<`is+"
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section .text ;code section declaration =X0"!y"
global _start ;entry point (start of execution) 8KQ]3Z9p
_start: mov edx,len ;string length y3]7^+k
mov ecx,msg ;string start nnV(MB4z1
mov ebx,1 ;file handle: stdout @C]Q;>^|
mov eax,4 ;sys_write OKo39 A\fu
int 80h ;kernel system call <F=U(WWn9
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mov ebx,0 ;return value B} %B4&Ij
mov eax,1 ;sys_exit /$
-^k[%
int 80h ;kernel system call |]dA`e&y
SA| AS<
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x86 CPU,Windows,MASM32 CMm:Vea
.386 Q]Ymv:M,
.model flat,stdcall z"b}V01F#
option casemap:none TsPx"+>7`
;Include 文件定义 j{i3lGaN
include windows.inc CLb~6LD
include user32.inc '.sS"QdN
includelib user32.lib D5wy7`c
include kernel32.inc ]}3AP!:
includelib kernel32.lib 7fVlA "x
;数据段 y5d=r]_S:
.data JF%eC}[d
szCaption db 'A MessageBox!',0 3HU_~%l
szText db 'Hello,world!',0 qP"+SVqC
;代码段 /kl41gx
.code 03WLVP@
start: {9tKq--@E9
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK bZ-"R 6a$
invoke ExitProcess,NULL Osb#<9{}
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> gEVN;G'B<=
end start {bxTODt@
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)T-C/ 3
AWK GOT@
BEGIN { print "Hello, world!" } W6_~.m"b
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djb
wA+QUN3#n
BASIC >vDa`| g
传统版BASIC(例如GWBASIC): K3uNR w
aZ[
aZU
10 PRINT "Hello, world!" C
#A sA
20 END LL|uMe"Jb
]SqLF!S(=
或在提示符输入: 3{gD'y4j
:L~{Q>o
?"Hello, world!":END zYCrfr
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现代版BASIC(例如Quick BASIC): g_kR5Wxpt
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Print "Hello, world!" k<1BE^[V
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以下的语句在Quick BASIC中同样有效: &