c++ - 将文件中的 0.0 读入 double Arr？

Question

我正在尝试从如下所示的文件中读取一堆 0.0:

0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

0.0 0.0 3.0 0.0 0.0 0.0 0.0 0.0 0.0

0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

使用此代码进入双 arr:

double arr[9] = { 0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0 };
int tilechoice = 0, random;

ifstream inchoice("D:\\Code\\C++\\Tic Tac Toe AI\\Choices.txt");
inchoice >> fixed >> setprecision(1);
for (int i = 0; i < 11839; i++)
{
    if (i == *b)
    {
        for (int j = 0; j < 9; j++)
        {
            inchoice >> arr[j];
        }
        break;
    }
    else
        inchoice.ignore(36);

(*b是数组的第3行号)

但是当我测试其中包含 3 的行的 arr 的输出时，它向我显示:

0.0 0.0 0.0 0.0 3.0 0.0 0.0 0.0 0.0

3.0 哪里错了？

Answer 1

您的代码可以简化，从而根本不需要那个笨拙的 inchoice.ignore。

ifstream inchoice("D:\\Code\\C++\\Tic Tac Toe AI\\Choices.txt");
std::string line; 

for (int i = 0; std::getline(inchoice, line); ++i)
{
    if (i == *b)
    {
        std::stringstream ss(line);
        for (int j = 0; j < 9; j++)
        {
            inchoice >> arr[j];
        }
    }
}