是循环条件写错了么？一直报异常

Question

public class next {
public void getnext(char s[],int next[])
{
int j=0;
int k=-1;
next[0]=-1;
while(s[j]!='\0')
{
if(k==-1)
{
next[++j]=0;
k=0;
}
else if(s[j]==s[k])
{
k++;
next[++j]=k;
}
else
{
k=next[k];
}
}
}

}

public class kmp {
public int kmp(char t[],char s[])
{
int i=0,j=0;
int []nex=new int[80];
next n=new next();
n.getnext(s,nex);
while(t[i]!='\0'&&s[j]!='\0')
{
if(t[i]==s[j])
{
i++;
j++;
}
else
{
j=nex[j];
if(j==-1)
{
i++;
j++;

            }
        }
    }
    if(s[j]=='\0')
    {
        return(i-s.length+1);
    }
    else
    {
        return 0;
    }
}

public static void main(String[] args) {
    // TODO Auto-generated method stub

    char []t={'q','w','e','r','s','a','a'};
    char []s={'s','a'};
    kmp k=new kmp();
    System.out.print(k.kmp(t, s));
}

}

Answer 1

public void getnext(char s[],int next[])
应该是
public void getnext(char[] s,int[] next)
吧，你用的看上去是Java，可是怎么混杂着C++的语法。