Заполнить матрицу
08.12.2021, 17:38. Показов 532. Ответов 1
Заполнить матрицу
float arr[6][6] =
{
{7, 7, 5, 9, 9, 6},
{5, 8, 1, 9, 8, 7},
{9, 6, 4, 7, 5, 8},
{4, 7, 5, 8, 4, 9},
{9, 2, 5, 6, 1, 6},
{8, 4, 3, 7, 5, 5}
}
а не рандомом.
Принцип понятен но у меня что то не идет он.
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| #include <iostream>
using namespace std;
void fill_matrix_rand(double** matr, const int n) // заполнение
{
for (int i = 0; i < n; i++)
{
for (int k = 0; k < n; k++)
{
matr[i][k] = rand() % 10;
}
}
}
void print_matrix(double** matr, const int n) // вывод матрицы
{
for (int i = 0; i < n; i++)
{
for (int j = 0; j < n; j++)
{
cout << matr[i][j] << " ";
}
cout << endl;
}
}
void fill_matrixBT(double** t, double** b, double** a, const int n) // заполнение
{
double s1 = 0;
double s2 = 0;
for (int i = 0; i < n; i++)
{
b[i][0] = a[i][0];
}
for (int j = 0; j < n; j++)
{
t[0][j] = a[0][j] / b[0][0];
}
for (int k = 1; k < n; k++)
{
for (int i = k; i < n; i++)
{
for (int m = 0; m < k; m++)
{
s1 += b[i][m] * t[m][k];
}
b[i][k] = a[i][k] - s1;
s1 = 0;
}
for (int j = k + 1; j < n; j++)
{
{
for (int m = 0; m < k; m++)
{
s2 += b[k][m] * t[m][j];
}
t[k][j] = 1 / b[k][k] * (a[k][j] - s2);
s2 = 0;
}
}
}
for (int i = 0; i < n; i++)
{
for (int k = 0; k < n; k++)
{
if (i < k)
b[i][k] = 0;
}
}
for (int i = 0; i < n; i++)
{
for (int k = 0; k < n; k++)
{
if (i > k)
t[i][k] = 0;
if (i == k)
{
t[i][k] = 1;
}
}
}
}
void fill_matrixBneg(double** b, double** y, int n)
{
double sum = 0;
for (int i = 0; i < n; i++)
{
for (int j = 0; j < n; j++)
{
if (j > i)
y[i][j] = 0;
else if (j == i)
y[i][j] = 1 / b[i][i];
else if (j < i)
{
sum = 0;
for (int m = j; m < i; m++)
sum = sum + b[i][m] * y[m][j];
y[i][j] = -1 / b[i][i] * sum;
}
}
}
}
void fill_matrixTneg(double** t, double** x, int n)
{
double sum = 0;
for (int i = n - 1; i >= 0; i--)
{
for (int j = n - 1; j >= 0; j--)
{
if (j < i)
x[i][j] = 0;
else if (j == i)
x[i][j] = 1;
else if (j > i)
{
x[i][j] = 0;
for (int m = i + 1; m <= j; m++)
x[i][j] = x[i][j] - t[i][m] * x[m][j];
}
}
}
}
void fill_matrixAneg(double** a, double** x, double** y, int n)
{
double sum = 0;
for (int i = 0; i < n; i++)
{
for (int j = 0; j < n; j++)
{
for (int m = 0; m < n; m++)
sum += x[i][m] * y[m][j];
a[i][j] = sum;
sum = 0;
}
}
}
int main()
{
setlocale(0, "ru");
int n;
cout << "Введите размер матрицы: ";
cin >> n;
cout << endl;
double** A = new double* [n]; // Создание матриц
for (int i = 0; i < n; i++)
{
A[i] = new double[n];
}
double** B = new double* [n];
for (int i = 0; i < n; i++)
{
B[i] = new double[n];
}
double** T = new double* [n];
for (int i = 0; i < n; i++)
{
T[i] = new double[n];
}
double** X = new double* [n];
for (int i = 0; i < n; i++)
{
X[i] = new double[n];
}
double** Y = new double* [n];
for (int i = 0; i < n; i++)
{
Y[i] = new double[n];
}
double** Aneg = new double* [n];
for (int i = 0; i < n; i++)
{
Aneg[i] = new double[n];
}
fill_matrix_rand(A, n);
cout << "Матрица A:" << endl;
print_matrix(A, n);
cout << endl;
fill_matrixBT(T, B, A, n);
cout << "Матрица B:" << endl;
print_matrix(B, n);
cout << endl;
cout << "Матрица T:" << endl;
print_matrix(T, n);
cout << endl;
fill_matrixBneg(B, Y, n);
cout << "Матрица B^-1:" << endl;
print_matrix(Y, n);
cout << endl;
fill_matrixTneg(T, X, n);
cout << "Матрица T^-1:" << endl;
print_matrix(X, n);
cout << endl;
cout << "Матрица A^-1:" << endl;
fill_matrixAneg(Aneg, X, Y, n);
print_matrix(Aneg, n);
cout << endl;
for (int i = 0; i < n; i++)
delete A[i];
delete[] A;
for (int i = 0; i < n; i++)
delete B[i];
delete[] B;
for (int i = 0; i < n; i++)
delete T[i];
delete[] T;
for (int i = 0; i < n; i++)
delete X[i];
delete[] X;
for (int i = 0; i < n; i++)
delete Y[i];
delete[] Y;
for (int i = 0; i < n; i++)
delete Aneg[i];
delete[] Aneg;
} |
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Сообщение было отмечено qbin как решение
