c++ - 为什么代码告诉我 vector 订阅超出范围

Question

我为神经元网络编写了一个程序，一切正常，但这些代码行:

for (unsigned i = 0; i < Net.size() - 1; i++)
    {
        //Net is a vector of Layers, Layers are a vector of neurons, and Neurons are a Vector of weights and a double "values", the weights are also doubles
        for (unsigned l = 0; l < Net[i].size(); i++)
        {


            for (unsigned k = 0; k < Net[i][l].weights.size(); k++)
            {
                Net[i + 1][k].value = sigmoid(Net[i + 1][k].value);

                Net[i+1][k].value += Net[i][l].value* Net[i][l].weights[k];


            }

        }

    }

执行错误Vector subscribting out of range，我尽力了，但找不到错误

Answer 1

你有这个错误

for (unsigned l = 0; l < Net[i].size(); i++)

应该是

for (unsigned l = 0; l < Net[i].size(); l++)

使用名为 l 的变量确实不是一个好主意, 很容易误认为 i或 1 .