#include <cplot.h> main() { int x,y; register int a; register int num; init(stderr); erase(); sxputsa( 20, 700, "type digits and ctrl/d to exit" ); while((num = scursor(&x,&y)) != EOF ) { num =- '0'; num =* 50; for(a=5;a<num;a=+ 7) scircle(x,y,a); } syputsa( x, y, "bye bye" ); finish(); }