我看了有人在说自己只会hello world程序,更有的人说还有很多人不会hello world程序都混得下去
难道hello world程序就这么神奇吗?
hello world程序到底是什么样的啊?真想开开眼界啊!!!!!
难道hello world程序就这么神奇吗?
hello world程序到底是什么样的啊?真想开开眼界啊!!!!!
解决方案 »
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hello,world!
hello,java world!
hello,C# world!
hello,earth!
Hello World is one of the simplest program in most computer languages. It is often considered to be tradition among programmers for people attempting to learn a new programming language to write a 'Hello World!' program as one of the first steps of learning that particular language.
// 程序的入口
public static void main(String[] args){
// 输出信息
System.out.println("HelloWorld!");
}
}
也可以说微笑的helloWorld !
public static void main(String arg[]){ System.out.print("Hello world ! 这样编。")
}
}
这只是程序,借助工具的话比如Eclipce,需要定义项目名,文件名,建议先不使用工具。
class HelloWorld{
public static void main(String[] args){
System.out.println("HelloWorld!");
}
}
public class HelloJava
{
public static void main (String args[])
{
System.out.println("Hello Java!");
}
}
Java源程序中语句所涉及到的小括号及标点符号都是英文状态下输入的,但字符串里的符号不受汉字或英文字符的限制。
class是Java的关键字,用来定义类。
Public static void main (String args[])是类中的一个方法。一个Java应用程序必须有一个类且只能有一个类含有这样的main方法,这个类称为应用程序的主类。在Java应用程序中main方法必须被说明为public static void。
源文件命名规则:如果源文件中有多个类,那么只能有一个类是public类,且源文件的名字必须与这个类的名子完全相同,扩展名为.java。如果源文件中没有public类,那么源文件的名字只要和某个类的名字相同,并且扩展名是.java就可以了。
本源文件命名为HelloJava.java,存在Hello Java文件夹中......
http://blog.csdn.net/skyhb/archive/2010/05/11/5576885.aspx可以到这儿来看看
public class Demo
` {
public static void main(String args[])
{
System.out.print(args[0]);
}
}
用jdk编译
javac Demo.java
java Demo hello world
public class HelloWorld{
public static void mian(String[] args){
System.out.println("Hello World!");
}
}
public class HelloWorld{
public static void mian(String[] args){
System.out.println("Hello,World!");
}
}
HelloWorld.javapublic class HelloWorld{
// 程序的入口
public static void main(String[] args){
// 输出信息
System.out.println("HelloWorld!");
}
}
package 宇宙.地球;public class 世界你好类
{
public static void main(String[] args)
{
String 消息 = "世界你好!";
System.out.println(消息);
}
}
2. 混乱C语言的源代码下面的所有程序都可以在GCC下编译通过,只有最后一个需要动用C++的编译器g++才能编程通过。
hello1.c
查看源代码
打印帮助
01 #define _________ }
02 #define ________ putchar
03 #define _______ main
04 #define _(a) ________(a);
05 #define ______ _______(){
06 #define __ ______ _(0x48)_(0x65)_(0x6C)_(0x6C)
07 #define ___ _(0x6F)_(0x2C)_(0x20)_(0x77)_(0x6F)
08 #define ____ _(0x72)_(0x6C)_(0x64)_(0x21)
09 #define _____ __ ___ ____ _________
10 #include<stdio.h>
11 _____hello2.c
查看源代码
打印帮助
1 #include<stdio.h>
2 main(){
3 int x=0,y[14],*z=&y;*(z++)=0x48;*(z++)=y[x++]+0x1D;
4 *(z++)=y[x++]+0x07;*(z++)=y[x++]+0x00;*(z++)=y[x++]+0x03;
5 *(z++)=y[x++]-0x43;*(z++)=y[x++]-0x0C;*(z++)=y[x++]+0x57;
6 *(z++)=y[x++]-0x08;*(z++)=y[x++]+0x03;*(z++)=y[x++]-0x06;
7 *(z++)=y[x++]-0x08;*(z++)=y[x++]-0x43;*(z++)=y[x]-0x21;
8 x=*(--z);while(y[x]!=NULL)putchar(y[x++]);
9 }hello3.c
查看源代码
打印帮助
01 #include<stdio.h>
02 #define __(a) goto a;
03 #define ___(a) putchar(a);
04 #define _(a,b) ___(a) __(b);
05 main()
06 { _:__(t)a:_('r',g)b:_('$',p)
07 c:_('l',f)d:_(' ',s)e:_('a',s)
08 f:_('o',q)g:_('l',h)h:_('d',n)
09 i:_('e',w)j:_('e',x)k:_('\n',z)
10 l:_('H',l)m:_('X',i)n:_('!',k)
11 o:_('z',q)p:_('q',b)q:_(',',d)
12 r:_('i',l)s:_('w',v)t:_('H',j)
13 u:_('a',a)v:_('o',a)w:_(')',k)
14 x:_('l',c)y:_('\t',g)z:___(0x0)}hello4.c
查看源代码
打印帮助
1 int n[]={0x48,
2 0x65,0x6C,0x6C,
3 0x6F,0x2C,0x20,
4 0x77,0x6F,0x72,
5 0x6C,0x64,0x21,
6 0x0A,0x00},*m=n;
7 main(n){putchar
8 (*m)!='\0'?main
9 (m++):exit(n++);}hello5.c
查看源代码
打印帮助
01 main(){int i,n[]={(((1<<1)<<(1<<1)<<(1<<
02 1)<<(1<<(1>>1)))+((1<<1)<<(1<<1))), (((1
03 <<1)<<(1<<1)<<(1<<1)<<(1<<1))-((1<<1)<<(
04 1<<1)<<(1<<1))+((1<<1)<<(1<<(1>>1)))+ (1
05 <<(1>>1))),(((1<<1)<<(1<<1)<<(1<<1)<< (1
06 <<1))-((1<<1)<<(1<<1)<<(1<<(1>>1)))- ((1
07 <<1)<<(1<<(1>>1)))),(((1<<1)<<(1<<1)<<(1
08 <<1)<<(1<<1))-((1<<1)<<(1<<1)<<(1<<(1>>1
09 )))-((1<<1)<<(1<<(1>>1)))),(((1<<1)<< (1
10 <<1)<<(1<<1)<<(1<<1))-((1<<1)<<(1<<1)<<(
11 1<<(1>>1)))-(1<<(1>>1))),(((1<<1)<<(1<<1
12 )<<(1<<1))+((1<<1)<<(1<<1)<<(1<<(1>>1)))
13 -((1<<1)<<(1<<(1>>1)))),((1<<1)<< (1<<1)
14 <<(1<<1)),(((1<<1)<<(1<<1)<<(1<<1)<<(1<<
15 1))-((1<<1)<<(1<<1))-(1<<(1>>1))),(((1<<
16 1)<<(1<<1)<<(1<<1)<<(1<<1))-((1<<1)<< (1
17 <<1)<<(1<<(1>>1)))-(1<<(1>>1))), (((1<<1
18 )<<(1<<1)<<(1<<1)<<(1<<1))- ((1<<1)<< (1
19 <<1)<<(1<<(1>>1)))+(1<<1)), (((1<<1)<< (
20 1<<1)<<(1<<1)<< (1<<1))-((1<<1)<< (1<<1)
21 <<(1<<(1>>1)))-((1<<1) <<(1<< (1>>1)))),
22 (((1<<1)<< (1<<1)<<(1<<1)<< (1<<1))- ((1
23 <<1)<<(1<<1)<<(1<<1))+((1<<1)<< (1<<(1>>
24 1)))), (((1<<1)<<(1<<1) <<(1<<1))+(1<<(1
25 >>1))),(((1<<1)<<(1<<1))+((1<<1)<< (1<<(
26 1>>1))) + (1<< (1>>1)))}; for(i=(1>>1);i
27 <(((1<<1) <<(1<<1))+((1 <<1)<< (1<<(1>>1
28 ))) + (1<<1)); i++) printf("%c",n[i]); }hello6.cpp下面的程序只能由C++的编译器编译(比如:g++)
查看源代码
打印帮助
01 #include <stdio.h>
02 #define _(_) putchar(_);
03 int main(void){int i = 0;_(
04 ++++++++++++++++++++++++++++
05 ++++++++++++++++++++++++++++
06 ++++++++++++++++++++++++++++
07 ++++++++++++++++++++++++++++
08 ++++++++++++++++++++++++++++
09 ++++i)_(++++++++++++++++++++
10 ++++++++++++++++++++++++++++
11 ++++++++++i)_(++++++++++++++
12 i)_(--++i)_(++++++i)_(------
13 ----------------------------
14 ----------------------------
15 ----------------------------
16 ----------------------------
17 ----------------i)_(--------
18 ----------------i)_(++++++++
19 ++++++++++++++++++++++++++++
20 ++++++++++++++++++++++++++++
21 ++++++++++++++++++++++++++++
22 ++++++++++++++++++++++++++++
23 ++++++++++++++++++++++++++++
24 ++++++++++++++++++++++++++i)
25 _(----------------i)_(++++++
26 i)_(------------i)_(--------
27 --------i)_(----------------
28 ----------------------------
29 ----------------------------
30 ----------------------------
31 ----------------------------
32 ------i)_(------------------
33 ----------------------------
34 i)return i;}
public class HelloWorld{
public static void main(String args []){
System.out.println("Hello,World");
}
}
这个强
我去问问爱因斯坦啊,这个hello world怎么写???
http://blog.csdn.net/mysticboys/archive/2006/04/21/672179.aspx
{
public static void main(String[] args)
{
System.out.println("HelloWorld!");
}
}
就是会用java输出一段话,已经有一点点认识了。。