#include <iostream>
using namespace std;
namespace primerLib{
void com(){
cout << "com()" << endl;
}
void com(const void *){
cout << "com(const void *)" << endl;
}
}
void com(int){
cout << "com(int)" << endl;
}
void com(double, double = 3.4){
cout << "com(double,double = 3.4)" << endl;
}
void com(char*, char* = 0){
cout << "com(char*,char* = 3.4)" << endl;
}
void main(){
using primerLib::com;//第二种情况
com(0);
}