Question

你好，我遇到了这个代码的问题我有一些逻辑，但仍然没有完成，我想假设在1p和500p之间的金额中计算出最小数量的硬币。当我使用500它不打印任何x.x什么我做错了，只有当我输入1或500以上任何帮助将是欣赏

public class exchange{
    public static void main(String[] args) 
    {
        int coin;
        int OnePound = 0;
        int TwoPound = 0;
        int FiftyP = 0;
        int TwentyP = 0;
        int TenP = 0;
        int FiveP = 0;
        int TwoP = 0;
        int OneP = 0;

        int Compare = 0;
        int Tcoins = 0 ;

        System.out.print("#Introduce the amount of Coins");
        coin = BIO.getInt();

        if (coin < 1 || coin > 500 )
        {
        System.out.print("Invalid amount "+coin+"p");
        }

        if (coin == 1)
        {
            System.out.println("1 coin");
            System.exit(1);
        }

        while (Compare != coin)
        {

            if ( 200 <= coin && Compare < coin )
            {
                Compare = Compare + 200;
                TwoPound = TwoPound + 1;
                Tcoins = Tcoins + 1;
            }

            if ( 100 <= coin && Compare < coin )
            {
                Compare = Compare + 100;
                OnePound = OnePound + 1;
                Tcoins = Tcoins + 1;
            }

            if ( 50 <= coin && Compare < coin )
            {
                Compare = Compare + 50;
                FiftyP = FiftyP + 1;
                Tcoins = Tcoins + 1;
            }

            if ( 20 <= coin && Compare < coin )
            {
                Compare = Compare + 20;
                TwentyP = TwentyP + 1;
                Tcoins = Tcoins + 1;
            }

            if ( 10 <= coin && Compare < coin )
            {
                Compare = Compare + 10;
                TenP = TenP + 1;
                Tcoins = Tcoins + 1;
            }

            if ( 5 <= coin && Compare < coin )
            {
                Compare = Compare + 5;
                FiveP = FiveP + 1;
                Tcoins = Tcoins + 1;
            }

            if ( 2 <= coin && Compare < coin )
            {
                Compare = Compare + 2;
                TwoP = TwoP + 1;
                Tcoins = Tcoins + 1;
            }

            if ( 1 <= coin && Compare < coin )
            {
                Compare = Compare + 1;
                OneP = OneP + 1;
                Tcoins = Tcoins + 1;
            }

        }

        System.out.print("Amount of coins: "+Tcoins);

    }
}

Answer 1

您必须测试运行总和与总数之间的差异：

        if ( 200 <= coin - Compare )
        {
            Compare = Compare + 200;
            TwoPound = TwoPound + 1;
            Tcoins = Tcoins + 1;
        }
        else if ( 100 <= coin - Compare )
        {
            Compare = Compare + 100;
            OnePound = OnePound + 1;
            Tcoins = Tcoins + 1;
        }

所有内容都需要else if，因为您想尝试较大的值，直到不再适合大值，然后尝试较小的值。

计算出变化中交付的最小硬币数量

1 个答案: