Question

我在将文件行放入结构时遇到问题。它一遍又一遍地输入相同的线。这是函数

bool readInventory(string filename)
{
int answer= false;
ifstream openfile;

openfile.open(filename);

if(!openfile.eof())
{
    products *pProducts;
    pProducts = new products[21];


    for(int i=0; i<5; i++)
    {

        openfile >> pProducts[i].PLU;
        openfile >> pProducts[i].name;
        openfile >> pProducts[i].opption;
        openfile >> pProducts[i].price;
        openfile >> pProducts[i].amount;
    }

    for(int i=0; i<5; i++)
    {
        cout << pProducts->PLU<<endl;
        cout << pProducts->name<<endl;
        cout << pProducts->opption<<endl;
        cout << pProducts->price<<endl;
        cout << pProducts->amount<<endl;
    }

    answer=true;

    openfile.close();
}
return(answer);


4101 BRAEBURN_REG 1 0.99 101.5

4021 DELICIOUS_GDN_REG 1 0.89 94.2

4020 DELICIOUS_GLDN_LG 1 1.09 84.2

4015 DELICIOUS_RED_REG 1 1.19 75.3

4016 DELICIOUS_RED_LG 1 1.29 45.6

任何帮助将不胜感激。

Answer 1

您反复打印相同的产品。在第二个for循环中索引产品，如下所示：

for(int i=0; i<5; i++)
{
    cout << pProducts[i].PLU<<endl;
    cout << pProducts[i].name<<endl;
    cout << pProducts[i].opption<<endl;
    cout << pProducts[i].price<<endl;
    cout << pProducts[i].amount<<endl;
}

另外，不要忘记delete[]指针pProducts！您目前有内存泄漏。（你应该真的使用std::vector）

逐行输入文件到结构中

1 个答案: