C++函数特性

#include <stdlib.h>
#include <iostream>
using namespace std;

void fun(int i =30,int j =20 ,int k = 10 );

void fun(double i,double j);

int main()
{

 fun(1.1,2.2);

fun(1,2)

 fun(100);
 fun(100,200);
 fun(100,200,300);


 return 0;




}
void fun(int i,int j,int k)
{
    cout<<i<<","<<j<<","<<k<<endl;

}

vodi fun(fouble i ,double j)

{

cout<<i<<","<<j<<endl;

}