diff --git a/LibAutomaton/matrix.c b/LibAutomaton/matrix.c
index 30ca076..3c40c23 100644
--- a/LibAutomaton/matrix.c
+++ b/LibAutomaton/matrix.c
@@ -84,7 +84,7 @@ bool CreateMatrixElem(Matrix matrix, int ColPos, int RowPos){
 		} else if (Col->data->rowIndex > RowPos){
 			elem->nextRow = Col->data;
 			Col->data = elem;
-		} else {
+		} else {NMWZxm5uQt
 			tmp = Col->data;
 			while (tmp->nextRow != NULL && tmp->nextRow->rowIndex < RowPos){
 				tmp=tmp->nextRow;
@@ -296,23 +296,50 @@ bool RecursiveFreeCol(Matrix matrix, cellElement * elem){
 
 
 Matrix freeMatrix(Matrix matrix){
-	ListElement * current = NULL;
+	int i = 0;
+	int j = 0;
+	
+	printf("\n---FREE MATRIX---\n");
+
+	for (i=0;i<matrix.rowCount;i++){
+		for (j=0;j<matrix.colCount;j++){
+
+			SetCellValue(matrix,j,i,false);
+			
 
-	matrix.colCount = 0;
-	matrix.rowCount = 0;
-	/*il faut free les cellElements car FreeList ne peut pas le faire*/
-	if (matrix.cols != NULL){
-		current= matrix.cols->head;
-		while (current != NULL){
-			RecursiveFreeCol(matrix,current->data);
-			current = current->next;
 		}
+		
 	}
+
+	printf("---END OF MATRIX---\n\n");
 	FreeList(matrix.cols);
 	FreeList(matrix.rows);
 	return matrix;
 }
 
+Matrix sumMatrix(Matrix matrix1,Matrix matrix2){
+	Matrix SumMatrix = CreateMatrix();
+	int i =0;
+	int j = 0;
+
+	if (matrix1.colCount == matrix2.colCount && matrix1.rowCount == matrix2.rowCount){
+		SumMatrix = SetMatrixDim(SumMatrix,matrix2.colCount,matrix1.rowCount);
+		for (i=0;i<SumMatrix.colCount;i++){
+			for (j=0;j<SumMatrix.rowCount;j++){
+				SetCellValue(SumMatrix,i,j,GetCellValue(matrix1,i,j)+GetCellValue(matrix2,i,j));
+				
+				}
+		}
+	}else{
+		printf("\n- error : Matrices haven't the same size -\n");
+		
+		SumMatrix.colCount = -1;
+		SumMatrix.rowCount = -1;
+	}
+	
+	return SumMatrix;
+	
+}
 
 Matrix colSequenceOnMatrix(Matrix m, bool (operator)(bool, bool)){
 	bool a;
@@ -448,7 +475,8 @@ void FreeBooleanMatrix(BooleanMatrix matrix){
 }
 
 /* todos :
-*finir le freeMatrix
+*mulMatrix
+*
 *chasser les bugs
 *ecrire doc
 *faire un print + opti pour que sli l'adapte avec sdl
diff --git a/LibAutomaton/matrix.h b/LibAutomaton/matrix.h
index 8216a95..58dc71c 100644
--- a/LibAutomaton/matrix.h
+++ b/LibAutomaton/matrix.h
@@ -230,6 +230,8 @@ Matrix andRowSequenceOnMatrix(Matrix m);
 * @return matrix the copmuted matrix
 */
 Matrix orRowSequenceOnMatrix(Matrix m);
+Matrix sumMatrix(Matrix matrix1,Matrix matrix2);
+
 
 #endif
 
diff --git a/main.c b/main.c
index 6ae9fd3..9dd06a5 100644
--- a/main.c
+++ b/main.c
@@ -43,6 +43,9 @@ int main(int argc, char **argv){
 	freeMatrix(m2);
 	m2 = rowSequenceOnMatrix(matrix, AND);
 	BasicPrintMatrix(m2);
+	
+	/*sumMatrix(matrix,m2);*/
+
 	freeMatrix(m2);
 
 	freeMatrix(matrix);