“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。 y]|Hrx
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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;_T,S[
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以下是用不同语言写成的Hello World程序的几个例子: 6&~8TH
Ada qEvHrsw},
with Ada.Text_Io; use Ada.Text_Io; Rh!B4oB4
procedure Hello is JCoDe.
begin VOc_7q_=
Put_Line ("Hello, world!"); C!KxY/*Px
end Hello; >B)&mC$$S
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汇编语言 Xv[5)4N
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x86 CPU,DOS,TASM 8bQ\7jb
MODEL SMALL l*^J}oY
IDEAL `#O%ZZ+
STACK 100H ML6Y_|6
|
H;('h#=cD
DATASEG U5 X\RXy~
HW DB 'Hello, world!$' *1FDK{
^%(HZ'$wC
CODESEG f681i(q"
MOV AX, @data (S1c6~
MOV DS, AX on?<3eED
MOV DX, OFFSET HW +/u)/ey
MOV AH, 09H E`#m0Q(8
INT 21H h`O"]2
MOV AX, 4C00H Z05kn{<a8
INT 21H <9zzjgzG{c
END VyQ@. Lm
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12
y=Eh
x86 CPU,GNU/Linux,NASM 8K: RoR
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). bI~ R6o
;Enter this into "hello.asm" then type: !|!k9~v!
;"nasm -f elf hello.asm" ^PwZP;On
;"ld hello.o -o hello" #_]/Mr1
;"./hello" '@4Myg* b
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section .data ;data section declaration S0,q@LV
msg db 'Hello World!',0AH !*2cK>`
len equ $-msg ;string length K%NNw7\A
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section .text ;code section declaration YU=Q`y[k
global _start ;entry point (start of execution) KGsS2
_start: mov edx,len ;string length P#^-{;Bu
mov ecx,msg ;string start 5u/d r9n
mov ebx,1 ;file handle: stdout R]{zGFnx
mov eax,4 ;sys_write =Uy;8et
int 80h ;kernel system call <(YE_<F*
sb8%!>C
mov ebx,0 ;return value -Jqm0)2
mov eax,1 ;sys_exit Q;9-aZ.H
int 80h ;kernel system call C\%T|ZDE
tK@|sZ>3\
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x86 CPU,Windows,MASM32 [k1N-';;;
.386 @VdkmqXz
.model flat,stdcall NifD
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option casemap:none N=Q<mj;,
;Include 文件定义 9f UD68Nob
include windows.inc ;<=Z\NX
include user32.inc }XmrfegF
includelib user32.lib ;/ wl.'GA
include kernel32.inc ~_l@
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includelib kernel32.lib Ynn:,
;数据段 --S1p0
.data Sq#AnD6To
szCaption db 'A MessageBox!',0
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szText db 'Hello,world!',0 ;Fo%R$y
;代码段 c@SNbY4}%
.code }sy^ed
start: GvAP
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK 6JrwPZB
invoke ExitProcess,NULL Zv[D{
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> Y.}"<{RQ
end start /l.:GH36f
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BEGIN { print "Hello, world!" } PjwDth
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BASIC dh9Qo4-{
传统版BASIC(例如GWBASIC): VtP^fM^{
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10 PRINT "Hello, world!" ;$a+ >
20 END !sknO53`H`
!
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或在提示符输入: C8{bqmlm@
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?"Hello, world!":END t`M4@1S"'
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现代版BASIC(例如Quick BASIC): V /.Na(C~
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Print "Hello, world!" P}`|8b1W
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以下的语句在Quick BASIC中同样有效: &7\=Jw7w
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? "Hello,world!" #}PQ !gZ
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BCPL k kZ2Jxvx
GET "LIBHDR" h+gaKh=k+
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LET START () BE bA_/6r)u
$( %IA1Y>`
WRITES ("Hello, world!*N") }4uHT.)
$) <wH"{G3?
<USK6!-G
"U"phLX
Befunge lr*p\vH
"!dlrow olleH">v 1;*4yJ2
, GyC/39<P
^_@ -(dtAo6
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pD@:]VP
Brainfuck CyfrnU8g
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< >^=;b5I2K
+++++++++++++++.>.+++.------.--------.>+.>. 1+F0$<e}
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C zAW+!C.
#include <stdio.h> L[s`8u<_)z
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int main(void) E"O6N.}.
{ AZ9;6Df
printf("Hello, world!\n"); z|F38(%JJN
return 0; > `1K0?_
} v~*Co}0OB
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