#include<iostream>
using namespace std;

//函数名相同，参数个数不同
int sum(int v1, int v2) {
	return v1 + v2;
}
int sum(int v1, int v2, int v3) {
	return v1 + v2 +v3;
}

//函数名相同，参数类型或顺序不同
void func(int v1, double v2) {
	cout << "func(int v1, double v2)" << endl;

}
void func(double v1, int v2) {
	cout << "func(double v1, int v2)" << endl;
}

//返回值不同，参数相同，不能构成重载
//int func() {
//	return 0;
//}
//double func() {
//	return 0;
//}

void display() {
	cout << "display()-" << endl;
}
void display(int a) {
	cout << "display(int)-" << a << endl;
}
void display(long a) {
	cout << "display(int)-" << a << endl;
}
void display(double a) {
	cout << "display(int)-" << a << endl;
}

int main() {
	display();
	display(10);
	display(10L);
	display(10.0);

	/*func(10, 10.5);
	func(10.5, 10);

	cout << sum(10, 20) << endl;
	cout << sum(10, 20, 30) << endl;*/
	getchar();
	return 0;
}