技術標籤：無聊之作

/// <summary>
/// 獲取方案
/// </summary>
/// <param name="nTotalFund">總資金</param>
/// <param name="nNum">購買商品的總數</param>
/// <param name="nUnitPrice">各類商品單價（預設為三種商品）</param>
public void GetSolution(int nTotalFund, int nNum, List<int
 
> nUnitPrice)
{
    var soluLists = new List<int[]>();
    for (var i = 0; i < nNum; i++)
    {
        for (var j = 0; j < nNum; j++)
        {
            for (var k = 0; k < nNum; k++)
            {
                var nTotalValue = nUnitPrice[0] * i + nUnitPrice[1] * j + nUnitPrice[
 
2] * k;
                if (nTotalValue == nTotalFund && i + j + k == nNum)
                    soluLists.Add(new[] { i, j, k });
            }
        }
    }
    var mInfo = new StringBuilder();
    mInfo.AppendLine("購買方案：");
    foreach (var t in soluLists)
    {
        mInfo.AppendLine
 
(nUnitPrice[0] + "元商品購買總數:" + t[0].ToString("D2"));
        mInfo.AppendLine(nUnitPrice[1] + "元商品購買總數:" + t[1].ToString("D2"));
        mInfo.AppendLine(nUnitPrice[2] + "元商品購買總數:" + t[2].ToString("D2"));
        var value = nUnitPrice[0] * t[0];
        value += nUnitPrice[1] * t[1];
        value += nUnitPrice[2] * t[2];
        mInfo.AppendLine("合計" + value.ToString("N") + "元整\n");
    }
    Debug.WriteLine(mInfo.ToString());
}

輸出結果：