LCS算法的C＋＋实现

#include<iostream>
using namespace std;

char* LCS(char* left,char* right);

int main(){
 char *left,*right;
 left = new char[1024];
 right = new char[1024];
 cout << "please input the first string:";
 cin >> left;
 cout << "please input the second string:";
 cin >> right;
 cout << "最长公共子串是：";
 cout << LCS(left,right)<<endl;
 return 0;
}

char* LCS(char*left,char* right){
 int lenLeft,lenRight;
 lenLeft = strlen(left);
 lenRight = strlen(right);
 int *c = new int[lenRight];
 int start,end,len;
 end = len = 0;
 for(int i = 0; i < lenLeft; i++){
  for(int j = lenRight-1; j >= 0; j--){
   if(left[i] == right[j]){
    if(i == 0 || j == 0)
     c[j] = 1;
    else
     c[j] = c[j-1]+1;
   }
   else
    c[j] = 0;
   if(c[j] > len){
    len = c[j];
    end = j;
   }
  }
 }
 char *p = new char[len+1];
 start = end - len + 1;
 for(i = start; i <= end; i++)
  p[i - start] = right[i];
 p[len] = '/0';
 return p;
}