c3

1sem/programming basics/z11/31.cpp

@@ -0,0 +1,41 @@
+// pb_z11_31.cpp
+// Горбацевич Андрей
+#include <iostream>
+
+using namespace std;
+
+int **read_matrix(size_t rows, size_t cols);
+void print_matrix(int **matrix, size_t rows, size_t cols);
+int **make2d(size_t nrows, size_t ncols, int val);
+
+int main() {
+    size_t rows, cols;
+    int filler;
+    cout << "rows, cols, filling_val >>>";
+    cin >> rows >> cols >> filler;
+    int **matrix = make2d(rows, cols, filler);
+    print_matrix(matrix, rows, cols);
+    return 0;
+}
+
+int **make2d(size_t nrows, size_t ncols, int val) {
+    int **out = new int*[nrows];
+    for(size_t i = 0; i < nrows; i++) {
+        int *row = new int[ncols];
+        for(size_t j = 0; j < ncols; j++)  {
+            *(row + j) = val;
+        }
+        *(out + i) = row;
+    }
+    return out;
+}
+
+void print_matrix(int **matrix, size_t rows, size_t cols) {
+    for(size_t i = 0; i < rows; i++) {
+        for(size_t j = 0; j < cols; j++)  {
+            cout << *(*(matrix + i) + j) << " ";
+        }
+        cout << endl;
+    }
+}
+

1sem/programming basics/z11/32.cpp

@@ -0,0 +1,51 @@
+// pb_z11_32.cpp
+// Горбацевич Андрей
+#include <iostream>
+
+using namespace std;
+
+int **read_matrix(size_t nrows, size_t ncols);
+void print_matrix(int **matrix, size_t nrows, size_t ncols);
+void fliplr(int **matrix, size_t nrows, size_t ncols);
+
+int main() {
+    size_t rows, cols;
+    cout << "rows, cols >>>";
+    cin >> rows >> cols;
+    int **matrix = read_matrix(rows, cols);
+    cout << "Before:" << endl;
+    print_matrix(matrix, rows, cols);
+    fliplr(matrix, rows, cols);
+    cout << "After:" << endl;
+    print_matrix(matrix, rows, cols);
+    return 0;
+}
+
+int **read_matrix(size_t nrows, size_t ncols) {
+    int **out = new int*[nrows];
+    for(size_t i = 0; i < nrows; i++) {
+        int *row = new int[ncols];
+        for(size_t j = 0; j < ncols; j++)  {
+            cin >> *(row + j);
+        }
+        *(out + i) = row;
+    }
+    return out;
+}
+
+void print_matrix(int **matrix, size_t nrows, size_t ncols) {
+    for(size_t i = 0; i < nrows; i++) {
+        for(size_t j = 0; j < ncols; j++)  {
+            cout << *(*(matrix + i) + j) << " ";
+        }
+        cout << endl;
+    }
+}
+
+void fliplr(int **matrix, size_t nrows, size_t ncols) {
+    for(size_t i = 0; i < nrows; i++) {
+        for(size_t j = 0; j < ncols/2; j++)  {
+            swap(*(*(matrix + i) + j), *(*(matrix + i) + ncols - j - 1));
+        }
+    }
+}

1sem/programming basics/z11/33.cpp

@@ -0,0 +1,53 @@
+// pb_z11_33.cpp
+// Горбацевич Андрей
+#include <iostream>
+
+using namespace std;
+
+int **read_matrix(size_t nrows, size_t ncols);
+void print_matrix(int **matrix, size_t nrows, size_t ncols);
+void transpose(int **matrix, size_t size);
+
+int main() {
+    size_t size;
+    cout << "size >>>";
+    cin >> size;
+    int **matrix = read_matrix(size, size);
+    cout << "Before:" << endl;
+    print_matrix(matrix, size, size);
+    transpose(matrix, size);
+    cout << "After:" << endl;
+    print_matrix(matrix, size, size);
+    return 0;
+}
+
+int **read_matrix(size_t nrows, size_t ncols) {
+    int **out = new int*[nrows];
+    for(size_t i = 0; i < nrows; i++) {
+        int *row = new int[ncols];
+        for(size_t j = 0; j < ncols; j++)  {
+            cin >> *(row + j);
+        }
+        *(out + i) = row;
+    }
+    return out;
+}
+
+void print_matrix(int **matrix, size_t nrows, size_t ncols) {
+    for(size_t i = 0; i < nrows; i++) {
+        for(size_t j = 0; j < ncols; j++)  {
+            cout << *(*(matrix + i) + j) << " ";
+        }
+        cout << endl;
+    }
+}
+
+void transpose(int **matrix, size_t size) {
+    for(size_t i = 0; i < size; i++) {
+        for(size_t j = i; j < size; j++)  {
+            int ri = *(*(matrix + i) + j);
+            int ci = *(*(matrix + j) + i);
+            swap(*(*(matrix + i) + j), *(*(matrix + j) + i));
+        }
+    }
+}