Elimination func created

main.cpp

@@ -2,15 +2,45 @@
 #include "tools/matrix.h"
 #include "tools/math.h"
 
+struct DestroyMatrix {
+    Matrix A;
+    ColumnVector C;
+    ColumnVector b;
+};
+
+DestroyMatrix destroyGeneralMatrix(Matrix& generalMatrix) {
+    int rows = generalMatrix.getRows();
+    int cols = generalMatrix.getColumns();
+
+    Matrix A(rows - 1, cols - 1);
+    ColumnVector C(cols - 1);
+    ColumnVector b(rows - 1);
+
+    for (int j = 0; j < cols - 1; ++j) {
+        C[j] = generalMatrix[0][j];
+    }
+
+    for (int i = 1; i < rows; ++i) {
+        b[i - 1] = generalMatrix[i - 1][cols - 1];
+    }
+
+    for (int i = 1; i < rows; ++i) {
+        for (int j = 0; j < cols - 1; ++j) {
+            A[i - 1][j] = generalMatrix[i][j];
+        }
+    }
+
+    return {A, C, b};
+}
+
 Matrix createGeneralMatrix(Matrix& A, ColumnVector& C, ColumnVector& b) {
     Matrix generalMatrix(A.getRows() + 1, A.getColumns() + 1);
     for (int i = 0; i < A.getColumns(); i++) {
         generalMatrix[0][i] = C[i];
     }
 
-    generalMatrix[0][A.getColumns()] = 0;
     for (int j = 0; j < A.getRows(); j++) {
-        generalMatrix[j + 1][A.getColumns()] = b[j];
+        generalMatrix[j][A.getColumns()] = b[j];
     }
 
     for (int i = 0; i < A.getRows(); i++) {
@@ -28,13 +58,13 @@ int main() {
     std::cin >> m;
 
     ColumnVector C(n);
-    Matrix A(n, m);
-    ColumnVector b(n);
+    Matrix A(m - 1, n);
+    ColumnVector b(m);
     double eps;
     double eps_default;
     std::cin >> C;
-    std::cin >> A;
     std::cin >> b;
+    std::cin >> A;
 
     std::cout << "Вектор C: " << C << std::endl;
     std::cout << "Вектор b: " << b << std::endl;
@@ -42,8 +72,14 @@ int main() {
     std::cout << "Матрица A: " << A << std::endl;
 
     Matrix E = createGeneralMatrix(A, C, b);
+    std::cout << "Матрица E: " << E << std::endl;
+
+    DestroyMatrix destroyed = destroyGeneralMatrix(E);
+    std::cout << "Вектор C: " << destroyed.C << std::endl;
+    std::cout << "Вектор b: " << destroyed.b << std::endl;
+
+    std::cout << "Матрица A: " << destroyed.A << std::endl;
 
-    std::cout << "Новая матрица:" << E << std::endl;
 
     return 0;
 }

tools/elimination.cpp

@@ -2,15 +2,53 @@
 #include "matrix.h"
 #include "math.h"
 
+struct FracturedMatrix {
+    Matrix A;
+    ColumnVector C;
+    ColumnVector b;
+    int pivot_column_index;
+    int pivot_row_index;
+};
+
+struct DestroyMatrix {
+    Matrix A;
+    ColumnVector C;
+    ColumnVector b;
+};
+
+DestroyMatrix destroyGeneralMatrix(Matrix& generalMatrix) {
+    int rows = generalMatrix.getRows();
+    int cols = generalMatrix.getColumns();
+
+    Matrix A(rows - 1, cols - 1);
+    ColumnVector C(cols - 1);
+    ColumnVector b(rows - 1);
+
+    for (int j = 0; j < cols - 1; ++j) {
+        C[j] = generalMatrix[0][j];
+    }
+
+    for (int i = 1; i < rows; ++i) {
+        b[i - 1] = generalMatrix[i - 1][cols - 1];
+    }
+
+    for (int i = 1; i < rows; ++i) {
+        for (int j = 0; j < cols - 1; ++j) {
+            A[i - 1][j] = generalMatrix[i][j];
+        }
+    }
+
+    return {A, C, b};
+}
+
 Matrix createGeneralMatrix(Matrix& A, ColumnVector& C, ColumnVector& b) {
     Matrix generalMatrix(A.getRows() + 1, A.getColumns() + 1);
     for (int i = 0; i < A.getColumns(); i++) {
         generalMatrix[0][i] = C[i];
     }
 
-    generalMatrix[0][A.getColumns()] = 0;
     for (int j = 0; j < A.getRows(); j++) {
-        generalMatrix[j + 1][A.getColumns()] = b[j];
+        generalMatrix[j][A.getColumns()] = b[j];
     }
 
     for (int i = 0; i < A.getRows(); i++) {
@@ -22,10 +60,42 @@ Matrix createGeneralMatrix(Matrix& A, ColumnVector& C, ColumnVector& b) {
     return generalMatrix;
 }
 
-Matrix elimination(Matrix A, ColumnVector C, ColumnVector b, int pivot_column_index, int pivot_row_index, double eps) {
+FracturedMatrix elimination(Matrix A, ColumnVector C, ColumnVector b, int pivot_column_index, int pivot_row_index) {
     Matrix generalMatrix = createGeneralMatrix(A, C, b);
+
+    int rows = generalMatrix.getRows();
+    int cols = generalMatrix.getColumns();
+
+    double pivotElement = generalMatrix[pivot_row_index][pivot_column_index];
+
+    for (int j = 0; j < cols; ++j) {
+        generalMatrix[pivot_row_index][j] /= pivotElement;
+    }
+
+    for (int i = 0; i < rows; ++i) {
+        if (i == pivot_row_index) 
+            continue;
+
+        double pivotColumnCoefficient = generalMatrix[i][pivot_column_index];
+
+        for (int j = 0; j < cols; ++j) {
+            generalMatrix[i][j] -= pivotColumnCoefficient * generalMatrix[pivot_row_index][j];
+        }
+    }
+
+    DestroyMatrix destroyedMatrix = destroyGeneralMatrix(generalMatrix);
+
+    pivot_column_index = Math::max_index(destroyedMatrix.C);
     
-    
-    return generalMatrix;
+    ColumnVector ratio_vector(A.getRows());
+
+    for (int i = 0; i < A.getRows(); i++) {
+      ratio_vector[i] = b[i] / A[i][pivot_column_index];
+    }
+
+    int pivot_row_index = Math::min_index(ratio_vector);
+
+    return {A, C, b, pivot_column_index, pivot_row_index};
 }
 
+

tools/elimination.h

@@ -5,7 +5,7 @@
 
 class Elimination {
     public:
-    Matrix elimination(Matrix A, ColumnVector C, ColumnVector b, int pivot_column_index, int pivot_row_index, double eps);
+    Matrix elimination(Matrix A, ColumnVector C, ColumnVector b, double eps);
 };
 
 

tools/math.cpp

@@ -1,7 +1,7 @@
 #include "math.h"
 #include "matrix.h"
 
-double Math::minVector(ColumnVector columnVector) {
+double Math::min(ColumnVector columnVector) {
     double temp = columnVector[0];
     for (int j = 0; j < columnVector.getColumns(); j++) {
         if (columnVector[j] < temp) {
@@ -11,7 +11,7 @@ double Math::minVector(ColumnVector columnVector) {
     return temp;
 }
 
-double Math::maxVector(ColumnVector columnVector) {
+double Math::max(ColumnVector columnVector) {
     double temp = columnVector[0];
     for (int j = 0; j < columnVector.getColumns(); j++) {
         if (columnVector[j] > temp) {
@@ -21,7 +21,31 @@ double Math::maxVector(ColumnVector columnVector) {
     return temp;
 }
 
-double Math::minArray(std::vector<double> array) {
+int Math::min_index(ColumnVector columnVector) {
+    int temp_index = 0;
+    double temp = columnVector[0];
+    for (int j = 0; j < columnVector.getColumns(); j++) {
+        if (columnVector[j] < temp) {
+            temp_index = j;
+            temp = columnVector[j];
+        }
+    }
+    return temp_index;
+}
+
+int Math::max_index(ColumnVector columnVector) {
+    int temp_index = 0;
+    double temp = columnVector[0];
+    for (int j = 0; j < columnVector.getColumns(); j++) {
+        if (columnVector[j] > temp) {
+            temp_index = j;
+            temp = columnVector[j];
+        }
+    }
+    return temp_index;
+}
+
+double Math::min(std::vector<double> array) {
     double temp = array[0];
     for (size_t i = 1; i < array.size(); i++) {
         if (array[i] < temp) {
@@ -31,7 +55,7 @@ double Math::minArray(std::vector<double> array) {
     return temp;
 }
 
-double Math::maxArray(std::vector<double> array) {
+double Math::max(std::vector<double> array) {
     double temp = array[0];
     for (size_t i = 1; i < array.size(); i++) {
         if (array[i] > temp) {
@@ -40,3 +64,27 @@ double Math::maxArray(std::vector<double> array) {
     }
     return temp;
 }
+
+double Math::min(std::vector<double> array) {
+    int temp_index = 0;
+    double temp = array[0];
+    for (size_t i = 1; i < array.size(); i++) {
+        if (array[i] < temp) {
+            temp_index = i;
+            temp = array[i];
+        }
+    }
+    return temp_index;
+}
+
+double Math::max(std::vector<double> array) {
+    int temp_index = 0;
+    double temp = array[0];
+    for (size_t i = 1; i < array.size(); i++) {
+        if (array[i] > temp) {
+            temp_index = i;
+            temp = array[i];
+        }
+    }
+    return temp_index;
+}

tools/math.h

@@ -4,14 +4,17 @@
 #include <vector>
 
 class ColumnVector;
-class Matrix;
 
 class Math {
 public:
-    double minVector(ColumnVector columnVector);
-    double maxVector(ColumnVector columnVector);
-    double minArray(std::vector<double> array);
-    double maxArray(std::vector<double> array);
+    double min(ColumnVector columnVector);
+    double max(ColumnVector columnVector);
+    static int min_index(ColumnVector columnVector);
+    static int max_index(ColumnVector columnVector);
+    double min(std::vector<double> array);
+    double max(std::vector<double> array);
+    int min_index(std::vector<double> array);
+    int max_index(std::vector<double> array);
 };
 
 #endif // MATH_H