Erase the previous line of text

Objective:  To move the text around the window.

We must erase the text before moving it. 

Otherwise, we will see yellow text smeared across the screen.

Listing 3 erases the current line of text in preparation for re-drawing it in the same or in a different location.

Listing 3. Erase the previous line of text.

//Draw black text on the existing text to erase it. textout_ex( screen,//Specify bitmap on the screen font,//Use a default font "HELLO WORLD",//Specify the text to display x,//x-coordinate for text y,//y-coordinate for text makecol(0,0,0),//Color text black -1 );//Transparent text background.