我正在实现一个单层感知器，在代码中找不到问题。问题是，当我运行一个程序时，我的第二个数据集是X（0，0，1），权重系数是W（0，0，0.01），因此我的激活应该等于0。01。虽然我得到的输出为0。下面是我的代码：

#include <iostream>
#include <vector>
#include <cstdlib>
#include <ctime>

using namespace std;

//Helper function to generate a random number between 0 and 1
double weight_coef() {
    //((double)rand() / RAND_MAX);
    srand(time(NULL));
    double random = static_cast<double>(rand() / RAND_MAX);
    random = round(random * 100) / 100.0; //to 2 dec points
    return random;
}

// Function to calculate the dot product of two vectors
double activation(vector<int> x, vector<double> w) {
    double result = 0.0;
    for (int i = 0; i < x.size(); i++) {
        result += static_cast<double>(x[i] * w[i]);
    }
    return result;
}

int main() {
    // Set up the data
    vector<vector<int>> X = { {0, 0, 0}, {0, 0, 1}, {0, 1, 0}, {0, 1, 1},
                             {1, 0, 0}, {1, 0, 1}, {1, 1, 0}, {1, 1, 1} };
    vector<int> T = { 0, 1, 1, 1, 0, 1, 1, 1 };

    // Set up the variables
    vector<double> w = { weight_coef(), weight_coef(), weight_coef()};
    double theta = 0.5;
    //double nu = 0.3;
    double nu = 0.01;
    //double nu = 0.02;
    int num_iterations = 0;
    bool all_errors_zero = false;

    // Loop until all errors are zero for all data points
    while (!all_errors_zero) {
        all_errors_zero = true;
        num_iterations++;

        // Loop through all data points
        for (int i = 0; i < X.size(); i++) {
            // Calculate the sum and output Y
            double sum = activation(X[i], w);
            int Y = (sum > theta) ? 1 : 0;

            // Calculate the error and delta
            double error = nu * (T[i] - Y);
            vector<double> delta = { 
                error * X[i][0],
                error * X[i][1],
                error * X[i][2]};

            double deltaTheta = error * theta;

            // Update the weights
            for (int j = 0; j < w.size(); j++) {
                w[j] += delta[j];
            }

            // Check if the error is zero
            if (error != 0) {
                all_errors_zero = false;
            }

            // Output the results
            cout << "Weights: [" << w[0] << ", " << w[1] << ", " << w[2] << "]\n";
            cout << "Data set " << i + 1 << ":\n";
            cout << "Activation: " << sum << "\n";
            cout << "Y: " << Y << "\n";
            cout << "T: " << T[i] << "\n";
            cout << "Delta: " << error << "\n";
            cout << "Delta * Weights: [" << delta[0] << ", " << delta[1] << ", " << delta[2] << "]\n";
            cout << "Delta * Theta: " << deltaTheta << "\n\n";
        }
    }

    // Output the final results
    cout << "Final weights: [" << w[0] << ", " << w[1] << ", " << w[2] << "]\n";
    cout << "Number of iterations: " << num_iterations << "\n";

    return 0;
}

如果你能告诉我出了什么问题，我会很感激的。