public static void main(String[] args) {
        int count = 0;
        for (int i = 0; i <=100; i++) {//循环次数控制
            int a = (int) (Math.random() * 100);
            System.out.println("a="+a);
            count++;
            if ( a == 97) {
                break;
            }
        }
        System.out.println("count=" + count);
    }