diff --git a/LibMatrix/matrix.c b/LibMatrix/matrix.c
index e818705..0c3b44e 100644
--- a/LibMatrix/matrix.c
+++ b/LibMatrix/matrix.c
@@ -668,23 +668,23 @@ bool equalsMatrix(Matrix m1, Matrix m2){
 
 void setRowToTrue(Matrix matrix, int RowNb){
 	int i =0;
-	for (i=0;i<m2.colCount;i++){
-		setCellValue(matrix,i,RowNb);	
+	for (i=0;i<matrix.colCount;i++){
+		setCellValue(matrix,i,RowNb,true);	
 	}
 	
 }
 
 void setColToTrue(Matrix matrix, int ColNb){
 	int i =0;
-	for (i=0;i<m2.rowCount;i++){
-		setCellValue(matrix,ColNb,i);	
+	for (i=0;i<matrix.rowCount;i++){
+		setCellValue(matrix,ColNb,i,true);	
 	}
 	
 }
 
 void createSquare(Matrix matrix){
-	setRowToTrue(matrix,rowCount/4);
-	setRowToTrue(matrix,rowCount*3/4);
-	setColToTrue(matrix,colCount/4);
-	setColToTrue(matrix,colCount*3/4);
+	setRowToTrue(matrix,matrix.rowCount/4);
+	setRowToTrue(matrix,matrix.rowCount*3/4);
+	setColToTrue(matrix,matrix.colCount/4);
+	setColToTrue(matrix,matrix.colCount*3/4);
 }
\ No newline at end of file
diff --git a/matrixmain.c b/matrixmain.c
index adb7628..33e9284 100644
--- a/matrixmain.c
+++ b/matrixmain.c
@@ -38,17 +38,31 @@ int main(){
 	BooleanMatrix bmatrix;
 
 	useSDL = inputYesOrNo("Do you want to use SDL library for matrix display ( interesting for big matrix only ) ?");
-	printf("A random matrix will be generated\n");
-	printf("Enter the number of columns of this matrix\n");
-	col = safeNumberInput(1, 30000);
-	printf("Enter the number of rows of this matrix\n");
-	row = safeNumberInput(1, 30000);
-	bmatrix = createBooleanMatrix(col, row);
+	
+	printf("Do you prefer : 1. A matrix with random values 2. An example matrix\n");
+	if (safeNumberInput(1, 2) == 2){
+		printf("Enter the number of columns of this matrix\n");
+		col = safeNumberInput(1, 30000);
+		printf("Enter the number of rows of this matrix\n");
+		row = safeNumberInput(1, 30000);
 
-	bmatrix = randomizeBooleanMatrix(bmatrix);
-	m1 = newMatrix(bmatrix);
-	freeBooleanMatrix(bmatrix);
+		m1 = createMatrix();
+		m1 = setMatrixDim(m1,col,row);
+		createSquare(m1);
 
+	}else{
+		printf("A random matrix will be generated\n");
+		printf("Enter the number of columns of this matrix\n");
+		col = safeNumberInput(1, 30000);
+		printf("Enter the number of rows of this matrix\n");
+		row = safeNumberInput(1, 30000);
+		bmatrix = createBooleanMatrix(col, row);
+
+		bmatrix = randomizeBooleanMatrix(bmatrix);
+		m1 = newMatrix(bmatrix);
+		freeBooleanMatrix(bmatrix);
+	}
+	
 	displayMatrixGUI(m1, useSDL);
 
 	while (cont){