Нужна срочно помощь. Тема : Весовая матрица

#include <iostream>
#include <iomanip> // setw

using namespace std;

bool is_weight_matrix(float const matrix[], size_t rows, size_t cols, float &weight) {
if(rows != cols) return false;

weight = 0;
for (int i = 0; i < rows; i++) {
for(size_t j = 0; j < cols; j++) {
weight += matrix[i * cols + j] * matrix[i * cols + j];
}
}
for(size_t i = 0; i < rows; i++) {
for(size_t j = 0; j < cols; j++) {
if(i == j) {
if(matrix[i * cols + j] != weight) return false;
} else {
// check for A*At == (cij)
float cij = 0;
for(size_t k = 0; k < cols; k++) {
cij += weight;
}
if(cij != 0) {
return false;
}
}
}
}
return true;
}
// Helper function for displaying errors
int test_is_weight_matrix(bool answer, float const matrix[], size_t rows, size_t cols, float expectedWeight)
{
float weight;
if (answer != is_weight_matrix(matrix, rows, cols, weight))
{
if (answer == true && weight == expectedWeight) {
clog << "Weight calculated: "<< weight << "Expected weight: " << expectedWeight << " Passed" << endl;
return 1;
} else {
clog << "Weight calculated: "<< weight << "Expected weight: " << expectedWeight << " Failed" << endl;
return 1;
}
}
return 0;
}

// The test function
int test_is_weight_matrix()
{
float matrix[4][4] {
{1, 0, 0, 1},
{0, 1, -1, 0},
{0, 1, 1, 0},
{-1, 0, 0, 1}
};

if(4 != 4) {
clog << "Matrix is not square, failed" << endl;
return 1;
}
float weight = 1;
for(int i = 0; i < 4; i++) {
weight *= matrix;
}
int e = test_is_weight_matrix(true, matrix[0], 4, 4, weight);

// Other test cases ...

return e;
}
int main()
{
int errors = test_is_weight_matrix();
if (errors == 0)
cout << "All tests passed\n";
else
cout << "Errors: " << errors << endl;
return 0;
}

Вывод:
Weight calculated: 8Expected weight: 1 Failed
Errors: 1

Неправильно считает предполагаемый вес матрицы, может кто пофиксить программу?