单项选择题

A.intfun(doublep){.;}
B.intfun(floatp){.;}floatfun(floatp){.;}floatfun(unsignedp){.;}intx;intx;x=fun(0);x=fun(0)
C.intfun(inti,intj=2){.;}
D.intfun(inti=2,intj=2){.;}floatfun(inti){.;}intfun(int*p){.;}cout