c++ - 如何使用 C++ 在函数中添加 double ？

Question

基本上我在 C++ 中设置了我的 double ，由于某种原因它给了我这个错误

"..\project2_name.cpp:56:9: 错误:函数'double total(double, double, double)''的分配。

double appleprice=0;
double pearprice=0;
double tomatoprice=0;
double completetotal=0;


double total(double appleprice, double pearprice, double tomatoprice)
{
    total = appleprice + pearprice + tomatoprice;
        return total;
}

我有一个开关盒，它从一个菜单中调用它，除了总计: 案例“3”: cout<< "你添加了一个番茄"<< endl; 番茄=产品添加(番茄)； 价格 = 3.02； tomatoprice = addprice(价格); cout << "你有订单"<< tomato << "tomatos."<< 结束; 休息；

    case '4':
        cout<< "Your Full order" << endl;
        completetotal = total(appleprice, pearprice, tomatoprice);
        cout << "You have on order " << apple << " apples. " << appleprice << " price."<< endl;
        cout << "You have on order " << pear << " pears. " << pearprice << " price."<< endl;
        cout << "You have on order " << tomato << " tomatos. " << tomatoprice << " price."<< endl;
        cout << "You have a total of " << completetotal << endl;
        break;

Answer 1

因为 total 是函数的名称 - 您不能使用它。使用临时变量或将代码更改为

double total(double appleprice, double pearprice, double tomatoprice)
{
    return appleprice + pearprice + tomatoprice;
}