下列程序的运行结果为（ ）。# include ＜ iostream．h ＞voidprint (double a){cout ＜＜ ++a；}void print (int a，int b){cout ＜＜ b ＜＜ a；}void main( ) {print (1.2)；cout ＜＜" "；print (3,4)；}

A．ios::in

B．ios::out

C．ios::in | ios::out

D．以上都不对