“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。 >1[ Hk0 <x
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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》。 6$qn'K$
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以下是用不同语言写成的Hello World程序的几个例子: F0O"rN{
Ada hX\z93an
with Ada.Text_Io; use Ada.Text_Io; 6$TE-l
procedure Hello is `<>Emc8Z
begin './j<2|;U
Put_Line ("Hello, world!"); sfSM7f
end Hello; ob=GB71j55
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汇编语言 W-9^Ncp
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x86 CPU,DOS,TASM <X}@afS
MODEL SMALL ek~bXy{O`
IDEAL XJl2_#
STACK 100H KlbL<9P>
h$)},% e
DATASEG uc@f# (-
HW DB 'Hello, world!$' CN6@g^)P
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CODESEG ^;0.P)yGA
MOV AX, @data 3dG[dYj
MOV DS, AX
1<RB} M
MOV DX, OFFSET HW V3O<l}ak
MOV AH, 09H f5jxF"oGNo
INT 21H j8*fa
MOV AX, 4C00H r'7>J:cy=
INT 21H Gp.+&\vi
END _w8iPL5:
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x86 CPU,GNU/Linux,NASM @l~zn%!X
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). k
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;Enter this into "hello.asm" then type: GaMiu!|,
;"nasm -f elf hello.asm" Id3i qAL
;"ld hello.o -o hello" k^-HY[Q9
;"./hello" 4%/iu)nx
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section .data ;data section declaration ?\HXYCi0r
msg db 'Hello World!',0AH }F*u
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len equ $-msg ;string length Vd8BQB,Q
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section .text ;code section declaration G4jaHpPi
global _start ;entry point (start of execution) 2iUdTy$
_start: mov edx,len ;string length BjT0mk"P
mov ecx,msg ;string start OV l,o
mov ebx,1 ;file handle: stdout nFVQOr;
mov eax,4 ;sys_write iNTw;ov
int 80h ;kernel system call bdn{Y
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mov ebx,0 ;return value ` "Gd/
mov eax,1 ;sys_exit t/6t{*-w
int 80h ;kernel system call 94=aVM\>>
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x86 CPU,Windows,MASM32 FyXz(l:
.386 K22' XrN
.model flat,stdcall u1?1x
option casemap:none Ib)>M`J
;Include 文件定义 Ha~g8R&
include windows.inc qlT'gUt=H
include user32.inc G3j&8[
includelib user32.lib Wr \rruH6
include kernel32.inc DqLZc01>
includelib kernel32.lib :v_H;UU
;数据段 [l+1zt0w0
.data sK#)wjj\^
szCaption db 'A MessageBox!',0 9d7$Fz#
szText db 'Hello,world!',0 py,B6UB5
;代码段 xD f<@
.code 4= VAJ
start: 1|za>N6[yu
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK it2@hZc5
invoke ExitProcess,NULL `-l,`7e'
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> e ;4y5i
end start P1f?'i?J
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BEGIN { print "Hello, world!" } 4v+4qyMyE
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BASIC kfF.Ctr1a
传统版BASIC(例如GWBASIC): HvWnPh1l
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10 PRINT "Hello, world!" 83*"58
20 END qg;[~JZYKi
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或在提示符输入: 8^3Z]=(Q
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?"Hello, world!":END zt 1Pu
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现代版BASIC(例如Quick BASIC): c
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Print "Hello, world!" ,q
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以下的语句在Quick BASIC中同样有效: 3|/<Pk
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? "Hello,world!" 6?U2Et
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BCPL :tu_@3bg-
GET "LIBHDR" DkP%1Crdr
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LET START () BE :@6,|2be=
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WRITES ("Hello, world!*N") `[JX}<~i
$) Re <G#*^
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Befunge 4_3
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#include <stdio.h> 28L3"c
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int main(void) lgC|3]
{ H4'xxsx
printf("Hello, world!\n"); 4C&L