Question

这是我的作业

我想写出方法卖出，允许股票的某些股票以给定价格出售。该方法有两个参数：作为int的多个份额，以及作为double的每股价格。该方法返回一个布尔值，以指示销售是否成功。例如：

// myStock now has 30 shares at total cost $90.00
boolean success = myStock.sell(5, 4.00);
// sells 5 shares at $4.00 successfully
// myStock now has 25 shares at total cost $70.00
success = myStock.sell(2, 5.00);
// sells 2 shares at $5.00 successfully
// myStock now has 23 shares at total cost $60.00  

My Code :

public static void buy(int numBuyShares, double priceBuyShares)
{
double tempTotalCost = ((double)numBuyShares * priceBuyShares);
totalShares += numBuyShares;
totalCost += priceBuyShares;

}
public static void sell(int numSellShares, double priceSellShares) 
{

 ?????
}

1.。）如何使用之前的购买股票和成本来减去卖出的股票和价格？

Answer 1

我想你想要这样的东西......

public static boolean sell(int numSellShares, double priceSellShares) {
    double sellCost = numSellShares * priceSellShares; // calculate total $
                                                        // to sell

    // assure 2 things:
    // shares to sell does not exceed total # of shares; and
    // total $ to sell does not exceed total cost
    if (numSellShares <= totalShares && sellCost <= totalCost) {
        // subtract #shares and cost from total
        totalShares -= numSellShares;
        totalCost -= sellCost;
        return true; // return success
    }
    // tried to sell more shares or $ than what exists
    else {
        return false; // return failure
    }
}

但又一次，不知道你的要求是什么，所以不能肯定是什么决定成败。

Java Sell Method Stock Class

1 个答案: