C语言程序设计教程（第三版）课后习题3.7 （Java代码）

public class Main{

        public static void password(){

                char a[]={'C','h','i','n','a'};

                        for(int i=0;i<5;i++){

                                a[i]=(char) (a[i]+4);

                                System.out.print(a[i]);

                        }

        }

        public static void main(String[] arg){

                        password();

        }

}