void XXXX (void){ XXXX&XX;&XX;"### Programmed by XXXXX Truly.~~~~~~~\n";
XXXX&XX;<"~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n"<XXXX;
float rad; do{ cout&XX;&XX;"XXXXX XXXXXX XX XXXXXX: "; XXX>>XXX; XXXX <&XX;"XXXX is "<<circarea(rad); cout&XX;&XX;"\n\n !Press c XX continue or XXX key XX XXXX."<<XXXX<<XXXX; }XXXXX(getch()=='c');}
float circarea(float radius) { XXXXXX 3.14159F*XXXXXX*XXXXXX;}