please help me with these small question on circle drawing strcuture

Hi

Would you please help me with the simple question in blue? Thanks.

Code:

// circstrc.cpp
// circles as graphics objects
#include "msoftcon.h"         // for graphics functions
////////////////////////////////////////////////////////////////
struct circle                 //graphics circle
   {
   int xCo, yCo;              //coordinates of center
   int radius;                
   color fillcolor;           //color
   fstyle fillstyle;          //fill pattern
   };
////////////////////////////////////////////////////////////////

/* Are "color" and "fstyle" some kind of data types? Perhaps, the details for these data types are in 'msoftcon' source file. */

void circ_draw(circle c)             
   {
   set_color(c.fillcolor);               //set color
   set_fill_style(c.fillstyle);          //set fill pattern
   draw_circle(c.xCo, c.yCo, c.radius);  //draw solid circle            
   }
//--------------------------------------------------------------

int main()
   {
   init_graphics();           //initialize graphics system
                              //create circles

/* Is "init_graphics()" a some kind of function? */
   
   circle c1 = { 15, 7, 5, cBLUE, X_FILL };
   circle c2 = { 41, 12, 7, cRED, O_FILL }; 
   circle c3 = { 65, 18, 4, cGREEN, MEDIUM_FILL };

/* The original structure was in this format:
struct circle { int xCo, yCo; int radius; color fillcolor; fstyle fillstyle; };

The don't you think the initialization should be this way (please notice the semicolons):
circle c1 = { 15, 7; 5; cBLUE; X_FILL }; */

   circ_draw(c1);             //draw circles
   circ_draw(c2);
   circ_draw(c3);
   set_cursor_pos(1, 25);     //cursor to lower left corner
   return 0;
   }

1. If color, fstyle, and init_graphics() mean anything at all, then they have to come from msoftcon.h.

2. We haven't ever, and don't now, use semicolons inside initialization groups.