基础练习 01字串

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public class Main {
    public static void main(String[] args){
        bool boo = new bool();
        boo.show();
        for(int i = 0; i < 31; i++){
            boo.OP();
            boo.show();
        }


    }
}

class bool{
    int[] b = new int[5];
    public bool(){
        for(int i = 0; i < b.length; i++){
            b[i]=0;
        }
    }

    public void OP(){
        for (int i = b.length-1; i > -1; i--){
            if(b[i]==0){
                b[i]=1;
                return;
            }else{
                b[i]=0;
            }
        }
    }

    public void show(){
        for(int x : b){
            System.out.print(x);
        }
        System.out.println();
    }
}