算法没搞好啊!!
#include<iostream>
#include<string>
using namespace std;
const int MAX = 100;
void LCSLength(string x, string y, int xlen, int ylen, int c[][MAX], int b[][MAX])
{
int i, j;
for(i = 0; i <= xlen ; i++)
c[i][0] = 0;
for(j = 0; j <= ylen ; j++)
c[0][j] = 0;
for(i = 1; i <= xlen ; i++){
for(j = 1 ; j <= ylen ; j++){
if(x[i-1] == y[j-1]){
c[i][j] = c[i-1][j-1] + 1;
b[i][j] = 0;
}
else if(c[i-1][j] >= c[i][j-1]){
c[i][j] = c[i-1][j];
b[i][j] = 1;
}
else{
c[i][j] = c[i][j-1];
b[i][j] = -1;
}
}
}
}
void PrintLCS(string x, int b[][MAX], int i, int j)
{
if(i == 0 || j == 0)
return;
if(b[i][j] == 0){
// cout<< x[i-1] <<' '; //逆序输出
PrintLCS(x, b, i-1, j-1);
cout<< x[i-1] <<' ';//注意次序 ,顺序输出
}
else if(b[i][j] == 1){
PrintLCS(x, b, i-1, j);
}
else{
PrintLCS(x, b, i, j-1);
}
}
int main()
{
string x = "abcdefggigk" ;
string y = "acdefhglkm" ;
int xlen = x.length();
int ylen = y.length();
int b[MAX][MAX];
int c[MAX][MAX];
LCSLength(x, y, xlen, ylen, c, b);
PrintLCS(x,b,xlen,ylen);
cout<<endl;
}