Demo01无重复数字

package 习题集2;
//有1,2,3,4四个数字，能组成多少个互不相同且无重复数字的三位数？都是多少？
public class Demo1 {
    public static void main(String[] args) {
        chank();
    }
    public static void chank(){
        for (int i = 1;i <= 4;i ++){
            for (int j = 1;j <= 4;j ++){
                for (int k = 1;k <= 4;k ++){
                    if (i != j && i != k && k != j){
                        System.out.println("可以组成：" + i + j + k);
                    }
                }
            }
        }
    }
}

/*
2.

int count = 0;
for (int i = 1;i <= 4;i ++){
    for (int j = 1;j <= 4;j ++){
        for (int k = 1;k <= 4;k ++){
            if (i != j && i != k && j != k){
                count ++;
                System.out.println(i * 100 + j * 10 + k);
            }
        }
    }
}
System.out.println(count);

*/