“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。 d4-cZw}+
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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》。 "{(4
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以下是用不同语言写成的Hello World程序的几个例子: RD p(Ci
Ada 8c'E
with Ada.Text_Io; use Ada.Text_Io; SbpO<8}8
procedure Hello is Ibl==Irk
begin j6$_U@)%O
Put_Line ("Hello, world!"); !Lj+&D|z
end Hello; [k6 5i
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汇编语言 utwqP~
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x86 CPU,DOS,TASM NvlG@^&S
MODEL SMALL !.k
IDEAL ~x}=lK N
STACK 100H .:s**UiDR
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DATASEG F%QVn.
HW DB 'Hello, world!$' Ndx ]5
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CODESEG .W%{j()op
MOV AX, @data |"a%S,I'
MOV DS, AX o%tvwv
MOV DX, OFFSET HW <El6?ml@
MOV AH, 09H +hS}msu'
INT 21H :ITz\m
MOV AX, 4C00H <)(STo
INT 21H xlaBOK a%
END wXsA-H/`
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x86 CPU,GNU/Linux,NASM 21U,!
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). 7uRXu>h
;Enter this into "hello.asm" then type: a|@^N
;"nasm -f elf hello.asm" . RNQlh3
;"ld hello.o -o hello" SQbnn"
;"./hello" yN~: 3
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section .data ;data section declaration '4qi^$|\
msg db 'Hello World!',0AH ~?{@0,$
len equ $-msg ;string length < F Cr
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section .text ;code section declaration PV%7m7=x
global _start ;entry point (start of execution) z|SLH<~
_start: mov edx,len ;string length R3$eq
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mov ecx,msg ;string start 2$? )VXtw
mov ebx,1 ;file handle: stdout =lG5Kc{B
mov eax,4 ;sys_write 8f |
int 80h ;kernel system call '&}B"1
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mov ebx,0 ;return value 5X-cDY*|
mov eax,1 ;sys_exit '%RYo#
int 80h ;kernel system call _dq.hW7
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x86 CPU,Windows,MASM32 %zB
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.386 w]\O3'0Js
.model flat,stdcall |L7
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option casemap:none (byFr9z
;Include 文件定义 '5eW"HGU]`
include windows.inc S-:l
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include user32.inc z6R<*$4
includelib user32.lib |S:St HZm
include kernel32.inc h^bbU.
includelib kernel32.lib Ydu=Jg5u7
;数据段 Qp${/
.data sEL[d2oO
szCaption db 'A MessageBox!',0 W$P)fPU'
szText db 'Hello,world!',0 e p;_'
;代码段 C;;dCsiV5
.code pFD L5
start: -$4PY,
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK F,`y_71<
invoke ExitProcess,NULL qgU$0enSs
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> o$YL\ <qp
end start 3%xj-7z
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BEGIN { print "Hello, world!" } H5=-b@(
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BASIC Xi1/wbC
传统版BASIC(例如GWBASIC): WrL&$dEJ?M
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10 PRINT "Hello, world!" }}l04kN_
20 END -pc*$oe
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或在提示符输入: i%0Ml:Y
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?"Hello, world!":END kL,AY-Iu{@
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现代版BASIC(例如Quick BASIC): +kQ$X{+;8
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Print "Hello, world!" {cKKTDN
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以下的语句在Quick BASIC中同样有效: zD-.bHo>.
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? "Hello,world!" =g$%.
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BCPL ED @9,W0
GET "LIBHDR" Dw?nf
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LET START () BE NS;,(v{*N
$( X[}5hZcX
WRITES ("Hello, world!*N") uG2Hzav
$) J(VJMS;_
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Befunge soXeHjNl
"!dlrow olleH">v x\GCsVy
, f 6Bx>lh
^_@ ; 7[5%xM
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Brainfuck Y dmYE$
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+++++++++++++++.>.+++.------.--------.>+.>. \L(~50{(
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C ]4yWcnf
#include <stdio.h> B{lBUv(B
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int main(void) uMtq4.
{ $3|++?
printf("Hello, world!\n"); :aR&t#<"E
return 0; N)03{$WM
} $uF}GP_)
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C++ =U!M,zw4
#include <iostream> OW\r }
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int main() m@R!o
{ )Y+n4UL3NK
std::cout << "Hello, world!" << std::endl; X<m#:0iD
return 0; [*Nuw_l
} VChNDHiH
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