“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。 ~%|G+m>
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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》。 }Ewo_P&`
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以下是用不同语言写成的Hello World程序的几个例子: )3z]f2
Ada qMS}t3X
with Ada.Text_Io; use Ada.Text_Io; _b4fS'[
procedure Hello is ;
a/cty0Ch
begin <-jGqUN_I
Put_Line ("Hello, world!"); fjDpwb:x)
end Hello; /k"hH\Pp
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._p""'Sa
汇编语言 \w)?SVp
76#.F
x86 CPU,DOS,TASM ?9u4a_x
MODEL SMALL {%']w
IDEAL d\XRUO[
STACK 100H $-@$i`Kf/
Wc#:f8dr
DATASEG .Tm- g#
HW DB 'Hello, world!$' {.#zHL
;
ZZ
A.a
CODESEG i@<~"~>]7
MOV AX, @data /?zW<QUI
MOV DS, AX j+748QAhh
MOV DX, OFFSET HW O5 7jz= r
MOV AH, 09H K a r~I
INT 21H a|N0(C
MOV AX, 4C00H J35l7HH
INT 21H 2A$0CUMb
END ~2N-k1'-'
2%]hYr;
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x86 CPU,GNU/Linux,NASM >7>7/7=O
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). %9c|%#3
;Enter this into "hello.asm" then type: }?O[N}>,m
;"nasm -f elf hello.asm" .9\Cy4_qSd
;"ld hello.o -o hello" Jc~E"x
;"./hello" J7a-CI_Tf
~!
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section .data ;data section declaration .wFU:y4r
msg db 'Hello World!',0AH z(d4)z 8'6
len equ $-msg ;string length ye r>
x
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section .text ;code section declaration uU+s!C9r
global _start ;entry point (start of execution) O=O(3Pf>
_start: mov edx,len ;string length -"Gl
4)
mov ecx,msg ;string start L/k40cEI^z
mov ebx,1 ;file handle: stdout tm xP Oe
mov eax,4 ;sys_write BpXEK.Xw
int 80h ;kernel system call HRRngk#lV
S.fXHtSx
mov ebx,0 ;return value ti;%BS
mov eax,1 ;sys_exit _XN~@5elrC
int 80h ;kernel system call `03<0L
+IsWI;lp
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x86 CPU,Windows,MASM32 CSL4P)
.386 *!u?
.model flat,stdcall <jL#>L%%
option casemap:none gLCz]D.'
;Include 文件定义 $T)d!$
include windows.inc A[Cg/
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include user32.inc A1!:BC
includelib user32.lib DM/hcY$MW
include kernel32.inc Y<ElJ>A2I
includelib kernel32.lib $PfV<Yj'B
;数据段 p[P[#IeL
.data 7jZrU|:yu(
szCaption db 'A MessageBox!',0 |2UauTp5yK
szText db 'Hello,world!',0 HU3Vv<lz
;代码段 bf^ly6ml
.code /Y ^7Rl
start: c20|Cx2m
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK .5k^f5a
invoke ExitProcess,NULL xDe47&qKM
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> ]EX--d<_`
end start 7+]F^
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2vXGO|W
AWK uk{J@&F
BEGIN { print "Hello, world!" } y%g`FC
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Y=WR6!{
BASIC gx&7 3f<J
传统版BASIC(例如GWBASIC): i~AJ.@
#
AuM:2N2
10 PRINT "Hello, world!" '!j(u@&!
20 END >?Qxpqf2
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或在提示符输入: B(EtXB9
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?"Hello, world!":END ^AH-+#5
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现代版BASIC(例如Quick BASIC): I9s$bRbT
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Print "Hello, world!" 8ok7|DJ
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以下的语句在Quick BASIC中同样有效: K \m4*dOv
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? "Hello,world!" 'XME?H:q a
z7$}#)Z7
1uj05aZh}
BCPL c; d"XiA
GET "LIBHDR" $u-lo|
n
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LET START () BE X!?wL0n
$( HO G=c!b
WRITES ("Hello, world!*N") kOzt"t&