怎么用web编程语言实现算法题

本篇内容主要讲解"怎么用web编程语言实现算法题"，感兴趣的朋友不妨来看看。本文介绍的方法操作简单快捷，实用性强。下面就让小编来带大家学习"怎么用web编程语言实现算法题"吧!

1、JAVA

import java.lang.reflect.Field;   public class Main {      public static void main (String[] args) throws Exception {          Class cache = Integer.class.getDeclaredClasses ()[0];          Field c = cache.getDeclaredField ("cache");          c.setAccessible (true);          Integer[] array = (Integer[]) c.get (cache);          array[132] = array[133];           System.out.printf ("%d",2 + 2);      }  }

输出：

5

2、C

int main () {      char __func_version__[] = "5″; // For source control char b[]="2″, a=2;      printf ("%d + %s = %s\n", a, b, a+b);      return 0;  }

3、C (Linux， gcc 4.7.3)

#include   int main (void)  {      int a=3, b=2;      printf ("%d + %d = %d", –a, b, a+b);  }

4、Haskell

λ> let 2+2=5 in 2+2 5

5、BBC BASIC

MODE 6  VDU 23,52,254,192,252,6,6,198,124,0  PRINT  PRINT "2+2=";2+2  PRINT "2+3=";2+3

6、Python

>>> patch = '\x312\x2D7' >>> import ctypes;ctypes.c_int8.from_address (id (len (patch)) +8) .value=eval (patch)  >>> 2 + 2 5

7、JavaScript

g = function () {    H = 3 return H + H  }   f = function () {    Η = 2 return Η + H  }   // 3 + 3 = 6 alert (g())  // 2 + 2 = 5 alert (f())

8、Bash

9、PHP

echo ’2 + 2 = ‘ . (2 + 2 === 4 ? 4 : 2 + 2 === 5 ? 5 : ‘dunno’);

10、Perl

# Generic includes use strict;  use warnings;  use 5.010;  use Acme::NewMath;   # Ok, time to begin the real program. if (2 + 2 == 5) {      say 5;  }  else {      say "Dunno...";  }

11、C#

static void Main (string[] args)  {      var x = 2;      var y = 2;       if (1 == 0) ;      {          ++x;      }       Console.WriteLine (x + y);  }

12、C++

#include    class Int  {  public:      Int (const int& a) : integ (a) {}       friend std::ostream& operator<<(std::ostream& oss, const Int& rhs)      {          return oss << rhs.integ;      }      int operator+(Int o)      {          if(integ == 2 && o.integ == 2)              return integ+o.integ+1;          return integ+o.integ;      }   private:      int integ;  };   int main ()  {      Int two = 2;      std::cout << two << " + " << two << " = " << two + two;  }

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