package javaapplication4;

public class Main {

    public static void main(String[] args) {
   
            String s="",cc;
        int v=0,c=0;
   
        s="want you to know one thing";
     cc=s.substring(1,2);
        for(int i=1;i<s.length();i++)
        {
            if(s.substring(i-1,i)=="n")  v=v+1;
            if(s.substring(i-1,i)=="c")  c=c+1;
        }
     System.out.print(c+"    "+  v+"   "+cc);
    }

}

答案怎么出来是0 0     郁闷