“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。 >"UXY)
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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》。 5M> 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: /Gnt.%y&
Ada {{gd}g
with Ada.Text_Io; use Ada.Text_Io; K8KN<Q s]
procedure Hello is E9k%:&]vd
begin +z9BWo!{I
Put_Line ("Hello, world!"); 1c/<2 xO~
end Hello; "1""1";
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汇编语言 _[8JSw7
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x86 CPU,DOS,TASM C%z9Q
MODEL SMALL _s-X5xU
IDEAL Y,mo}X<>
STACK 100H .z$UNB(!M
p\I3 fI0i
DATASEG U(+QrC:
HW DB 'Hello, world!$' _\+0e:Ae
?mV2|;
CODESEG K~]Xx~F
MOV AX, @data 9*JxP%8T~X
MOV DS, AX 5Th\wTh04
MOV DX, OFFSET HW o4 "HE*
MOV AH, 09H
1Z_]Ge<a
INT 21H .rg "(I
MOV AX, 4C00H k^JgCC+
INT 21H .FYRi_Zd
END h+dk2|a
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x86 CPU,GNU/Linux,NASM #mioT",bm=
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). H9_>a->
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;Enter this into "hello.asm" then type: LkafB2y
;"nasm -f elf hello.asm" Eb5>c/(
;"ld hello.o -o hello" ?st}rJ_
;"./hello" ?3LV$S)U
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section .data ;data section declaration Pvv7|AV
msg db 'Hello World!',0AH _;BNWH
len equ $-msg ;string length ^eoW+OxH
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section .text ;code section declaration Z@m5hx&
global _start ;entry point (start of execution) V/\`:
_start: mov edx,len ;string length l YdATM(h
mov ecx,msg ;string start 8%; .H-
mov ebx,1 ;file handle: stdout dhg($m
mov eax,4 ;sys_write B\|^$z2
int 80h ;kernel system call ]LCL?zAzH!
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mov ebx,0 ;return value MjBI1|*
mov eax,1 ;sys_exit PHez5 }T
int 80h ;kernel system call iN Lt4F[i
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x86 CPU,Windows,MASM32 S=L#8CID
.386 /gaC
.model flat,stdcall o{2B^@+Vb
option casemap:none 1)xj 'n
;Include 文件定义 /ml+b8@
include windows.inc K)Ya%%6[U#
include user32.inc HA$7Q~{N-t
includelib user32.lib RU.MJ
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include kernel32.inc E^w0X,0XlE
includelib kernel32.lib 0ikA@SAq
;数据段 : @gW3'
.data e=tM=i"
szCaption db 'A MessageBox!',0 Z0~,cO8~
szText db 'Hello,world!',0 ~T._v;IT
;代码段 H11@ DQ6
.code fA V.Mj-
start: Q&&=:97d
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK Zic:d-Q47
invoke ExitProcess,NULL {poTA+i
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> m,4'@jg0
end start uW(Ngcpr
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][\ uH|
AWK Nhjz~S<o
BEGIN { print "Hello, world!" } 1 j|XC
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BASIC ]3U|K .G
传统版BASIC(例如GWBASIC): /HSg)
aO:A pOAO
10 PRINT "Hello, world!" xy)W_~Mk
20 END :W'.SRD
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或在提示符输入: 5 "x1Pln
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?"Hello, world!":END ZE/Aj/7Qy
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现代版BASIC(例如Quick BASIC): ? a?]
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Print "Hello, world!" s BuXwa
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