A.int x =fun(5,0);B.int x =fun();C.int y =fun(0);D.int y =fun(5);
A.void fun1(double x,double y,int z){......}B.void fun2(double x,double y){......}C.int fun1(int x,double y){......}D.double fun2(int x,int y){......}
A.7B.8C.9D.10