--- hexcompare-101/gui.c
+++ hexcompare-101/gui.c
@@ -39,7 +39,7 @@
 {	            
 	// With a given offset, calculate which element it corresponds to
 	// in the offset_index.            
-	int i, current_block;                       
+	int i, current_block = 0;                       
 	for (i = 0; i < total_blocks; i++) {
 		
 		// Go block by block, and see if our offset is greater than
@@ -62,7 +62,7 @@
 	char offset_query[32];
 	char offset_line[32];
 	int offset_size = 0;
-	int previous_size, current_size, i;
+	int previous_size, current_size = 0, i;
 	int redo_loop = false; 
 	
 	// Endless loop until we figure out an offset size that is constant
@@ -533,10 +533,6 @@
 	
 	// Create variables.
 	int i, j;
-	bool active_declared = false;
-	int offset_string_length = 0;
-	unsigned long temp_offset;
-	char offset_line[32];
 	
 	// Define colors block diagram.
 	init_pair(BLOCK_SAME,      COLOR_WHITE, COLOR_BLUE);
@@ -621,12 +617,6 @@
 	// 
 	// 
 	
-	// Create variables.
-	int i, j;
-	bool active_declared = false;
-	int offset_string_length = 0;
-	unsigned long temp_offset;
-	
 	// Define colors block diagram.
 	init_pair(BLOCK_SAME,      COLOR_WHITE, COLOR_BLUE);
 	init_pair(BLOCK_DIFFERENT, COLOR_WHITE, COLOR_RED);  
@@ -753,7 +743,6 @@
 	while((key_pressed = wgetch(main_window)) != 'q')
 	{	
 		int rows; 
-		int bytes_per_row = (width - SIDE_MARGIN*2) * bytes_per_block;
 		if (mode == OVERVIEW_MODE) rows = 5; else rows = height - 5;
 		
 		switch(key_pressed)