ANN “运行时检查失败 #2 - 变量“outputLayer”周围的堆栈已损坏。”运行后出错

问题描述 投票:0回答:1

我用C写了一个神经网络。有一个神经元模型结构和输入、隐藏然后输出层结构。这段代码实际上是由 Python 编写的,但我将其转换为 C。调试或运行后出现类似错误 “运行时检查失败 #2 - 变量“outputLayer”周围的堆栈已损坏。” 预测输出是正确,但最后还是出现了错误。这是下面的代码。

#include<stdio.h>
#include<math.h>
#define INPUT_SIZE 3 
#define HIDDEN_SIZE 8
#define OUTPUT_SIZE 1
#define LEARNING_RATE 0.09
#define EPOCHS 20000



struct Neuron {
    double weights[INPUT_SIZE];

    double bias;
};

double relu(double x) {
    return fmax(0, x);
}

double sigmoid(double x) {
    return 1.0 / (1.0 + exp(-x));
}

double sigmoid_derivative(double x) {
    return x * (1 - x);
}

double calculateNeuronOutput(struct Neuron *neuron, double inputs[], int use_relu) {

    double sum = neuron->bias;
    for (int i = 0; i < INPUT_SIZE; i++) {
        sum += inputs[i] * neuron->weights[i];
    }
    
    if (use_relu){
        return relu(sum);
    }
    else {
        return sigmoid(sum);
    }

}
void backPropagation(struct Neuron inputLayer[], struct Neuron hiddenLayer[], 
                          struct Neuron outputLayer[], double inputVector[], double target) {

    double hiddenLayerOutput[HIDDEN_SIZE];
    for (int i = 0; i < HIDDEN_SIZE; i++) {
        hiddenLayerOutput[i] = calculateNeuronOutput(&hiddenLayer[i], inputVector, 1);
    }

    double output = calculateNeuronOutput(&outputLayer[0], hiddenLayerOutput, 0);

    double error = 0.5 * pow(target - output, 2);

    double output_error = target - output;
    double output_delta = output_error * sigmoid_derivative(output);

    double hiddenLayer_error[HIDDEN_SIZE];
    for (int i = 0; i < HIDDEN_SIZE; i++) {
        hiddenLayer_error[i] = output_delta * outputLayer[0].weights[i];
    }

    for (int i = 0; i < HIDDEN_SIZE; i++) {
        for (int j = 0; j < INPUT_SIZE; j++) {
            hiddenLayer[i].weights[j] += LEARNING_RATE * hiddenLayer_error[i] * inputVector[j];

        }
        hiddenLayer[i].bias += LEARNING_RATE * hiddenLayer_error[i];
    }

    for (int i = 0; i < OUTPUT_SIZE; i++) {
        for (int j = 0; j < HIDDEN_SIZE; j++) {
            outputLayer[i].weights[j] += LEARNING_RATE * output_delta * hiddenLayerOutput[j];
        }
        outputLayer[i].bias += LEARNING_RATE * output_delta;
    }
}


int main() {
        
    struct Neuron inputLayer[INPUT_SIZE] = {
        {{0.1, -0.2, 0.3}, 0.1},
        {{0.2, -0.1, -0.3}, 0.2},
        {{0.3, 0.4, -0.1}, 0.2},
    };

    struct Neuron hiddenLayer[HIDDEN_SIZE] = {
        {{0.1, 0.2, 0.3}, 0.1},
        {{0.2, 0.1, -0.3}, 0.2},
        {{0.3, 0.4, 0.1}, 0.3},
        {{0.2, 0.1, 0.4}, -0.4},
        {{0.5, 0.2, -0.3}, -0.1},
        {{0.1, 0.3, 0.2}, 0.4},
        {{0.3, -0.4, 0.1}, 0.2},
        {{0.4, 0.2, -0.1}, -0.3}

    };

    struct Neuron outputLayer[OUTPUT_SIZE] = {
        {{0.1, -0.2, 0.3}, 0.2}

    };
    
    double inputVector[4][INPUT_SIZE] = { { 0.0, 0.0, 1.0 },{0.0, 1.0, 0.0},{0.0, 1.0, 1.0},{1.0, 1.0, 1.0 } };
    double targetOutput[4] = { {0.0},{1.0},{1.0},{0.0} };

    for (int epoch = 0; epoch < EPOCHS; epoch++) {

        for(int i=0; i< 4; i++){
            
            backPropagation(inputLayer, hiddenLayer, outputLayer, inputVector[i], targetOutput[i]);
        }
            

        if (epoch % 1000 == 0) {
            double totalError = 0.0;
            for (int i = 0; i < 4; i++) {

                double hiddenLayerOutput[HIDDEN_SIZE];
                for (int j = 0; j < HIDDEN_SIZE; j++) {
                    hiddenLayerOutput[j] = calculateNeuronOutput(&hiddenLayer[j], inputVector[i], 1);
                }
                double output = calculateNeuronOutput(&outputLayer[0], hiddenLayerOutput, 0);

                double error = 0.5 * pow(targetOutput[i] - output, 2);
                totalError += error;

            }
            printf("Epoch: %d, Loss: %f\n", epoch, totalError);
        }
    }
    
    // Tahmin 

    double predictionInput[4][INPUT_SIZE] = { { 0.0, 0.0, 1.0 },{0.0, 0.0, 1.0},{0.0, 1.0, 1.0},{0.0, 1.0, 1.0 } };
    
    for (int i = 0; i < 4; ++i) {
        double hiddenLayerOutput[HIDDEN_SIZE];
        for (int j = 0; j < HIDDEN_SIZE; ++j) {
            hiddenLayerOutput[j] = calculateNeuronOutput(&hiddenLayer[j], predictionInput[i], 1);
        }

        double finalOutput = calculateNeuronOutput(&outputLayer[0],hiddenLayerOutput, 0);

        printf("Input: (%f, %f, %f), Exact Output: %f, Predicton: %f\n",
            predictionInput[i][0], predictionInput[i][1], predictionInput[i][2], targetOutput[i], finalOutput);
    }

    return 0;

}

我可以得到下面的输出,但在最后一行我得到了这个错误。

{纪元:0,损失:0.526654 纪元:1000,损失:0.003173 纪元:2000,损失:0.001147 纪元:3000,损失:0.000665 纪元:4000,损失:0.000458 纪元:5000,损失:0.000346 纪元:6000,损失:0.000275 纪元:7000,损失:0.000228 纪元:8000,损失:0.000194 纪元:9000,损失:0.000168 纪元:10000,损失:0.000148 纪元:11000,损失:0.000132 纪元:12000,损失:0.000119 纪元:13000,损失:0.000108 纪元:14000,损失:0.000099 纪元:15000,损失:0.000091 纪元:16000,损失:0.000085 纪元:17000,损失:0.000079 纪元:18000,损失:0.000074 纪元:19000,损失:0.000069 输入:(0.000000, 0.000000, 1.000000),实际输出:0.000000,预测:0.006382 输入:(0.000000, 1.000000, 0.000000),实际输出:1.000000,预测:0.999901 输入:(0.000000, 1.000000, 1.000000),实际输出:1.000000,预测:0.992201 输入:(1.000000, 1.000000, 1.000000),实际输出:0.000000,预测:0.005400 }

这是错误{运行时检查失败#2 - 变量“outputLayer”周围的堆栈已损坏。}

c neural-network runtime-error
1个回答
0
投票

至少这个,在

backPropagate()

    double hiddenLayer_error[HIDDEN_SIZE];
    for (int i = 0; i < HIDDEN_SIZE; i++) {
        hiddenLayer_error[i] = output_delta * outputLayer[0].weights[i];
    }

outputLayer[0].weights[]
是一个大小为 3 的数组。

您的循环将该数组索引为从 0 到 7。

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