diff --git a/matrix.c b/matrix.c
index ad00628..964aa0c 100644
--- a/matrix.c
+++ b/matrix.c
@@ -6,30 +6,166 @@
 
 Matrix createMatrix(unsigned int rows, unsigned int cols)
 {
+    Matrix matrix;
+
+
+    matrix.rows = rows;
+    matrix.cols = cols;
+
+
+    if (rows == 0 || cols == 0) {
+        matrix.data = NULL;
+        return matrix;
+    }
+
+
+    matrix.data = (MatrixType*) malloc(rows * cols * sizeof(MatrixType));
+
+
+    if (matrix.data == NULL) {
+
+        matrix.rows = 0;
+        matrix.cols = 0;
+        return matrix;
+    }
+
+
+    for (unsigned int i = 0; i < rows * cols; i++) {
+        matrix.data[i] = 0;
+    }
+
+    return matrix;
     
 }
 
 void clearMatrix(Matrix *matrix)
 {
-    
+    if (matrix->data == NULL) {
+        return;
+    }
+
+
+    free(matrix->data);
+
+
+    matrix->data = NULL;
+    matrix->rows = 0;
+    matrix->cols = 0;
 }
 
 void setMatrixAt(MatrixType value, Matrix matrix, unsigned int rowIdx, unsigned int colIdx)
 {
-    
+
+    if (rowIdx >= matrix.rows || colIdx >= matrix.cols) {
+
+        return;
+    }
+
+
+    unsigned int index = rowIdx * matrix.cols + colIdx;
+
+
+    matrix.data[index] = value;
 }
 
 MatrixType getMatrixAt(const Matrix matrix, unsigned int rowIdx, unsigned int colIdx)
 {
-    
+
+    if (rowIdx >= matrix.rows || colIdx >= matrix.cols) {
+
+        return 0;
+    }
+
+
+    unsigned int index = rowIdx * matrix.cols + colIdx;
+
+
+    return matrix.data[index];
 }
 
 Matrix add(const Matrix matrix1, const Matrix matrix2)
 {
-    
+    Matrix result;
+
+
+    if (matrix1.rows != matrix2.rows || matrix1.cols != matrix2.cols ||
+        matrix1.data == NULL || matrix2.data == NULL) {
+
+        result.rows = 0;
+        result.cols = 0;
+        result.data = NULL;
+        return result;
+        }
+
+
+    result = createMatrix(matrix1.rows, matrix1.cols);
+
+
+    if (result.data == NULL) {
+        return result;
+    }
+
+
+    unsigned int totalElements = matrix1.rows * matrix1.cols;
+
+    for (unsigned int i = 0; i < totalElements; i++) {
+        result.data[i] = matrix1.data[i] + matrix2.data[i];
+    }
+
+    return result;
 }
 
 Matrix multiply(const Matrix matrix1, const Matrix matrix2)
 {
-    
+    Matrix result;
+
+
+    if (matrix1.data == NULL || matrix2.data == NULL ||
+        matrix1.rows == 0 || matrix1.cols == 0 ||
+        matrix2.rows == 0 || matrix2.cols == 0) {
+
+        result.rows = 0;
+        result.cols = 0;
+        result.data = NULL;
+        return result;
+        }
+
+
+    if (matrix1.cols != matrix2.rows) {
+
+        result.rows = 0;
+        result.cols = 0;
+        result.data = NULL;
+        return result;
+    }
+
+
+    result = createMatrix(matrix1.rows, matrix2.cols);
+
+    if (result.data == NULL) {
+        return result;
+    }
+
+
+    for (unsigned int i = 0; i < matrix1.rows; i++) {
+        for (unsigned int j = 0; j < matrix2.cols; j++) {
+            MatrixType sum = 0;
+
+            for (unsigned int k = 0; k < matrix1.cols; k++) {
+
+                unsigned int index1 = i * matrix1.cols + k;
+
+
+                unsigned int index2 = k * matrix2.cols + j;
+
+                sum += matrix1.data[index1] * matrix2.data[index2];
+            }
+
+
+            unsigned int indexResult = i * result.cols + j;
+            result.data[indexResult] = sum;
+        }
+    }
+
+    return result;
 }
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