c++ - 将文件逐行输入到结构中

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同一行。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

如有任何帮助，我们将不胜感激。

Answer 1

您一遍又一遍地打印相同的产品。像这样在第二个 for 循环中索引产品:

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;
}

此外，不要忘记delete[] 您的pProducts 指针!您当前有内存泄漏。 (你真的应该为此使用 std::vector)