函数重载，不同数据类型交换

#include <iostream>

using namespace std;
void fun(int a,int b)
{
    int temp=a;
    a=b;
    b=temp;
    cout << "a = " << a << " b = " << b << endl ;
}
void fun(char a,char b)
{
    char temp=a;
    a=b;
    b=temp;
    cout << "a = " << a << " b = " << b << endl ;
}
void fun(double a, double b)
{
    double temp=a;
    a=b;
    b=temp;
    cout << "a = " << a << " b = " << b << endl ;
}
void fun(string a,string b)
{
    string temp=a;
    a=b;
    b=temp;
    cout << "a = " << a << " b = " << b << endl ;
}
int main()
{
    fun(1,2);
    fun('a','b');
    fun(1.2,1.5);
    fun("hello","world");
    return 0;
}

#include <iostream>

using namespace std;
void fun(int a,int b)
{
    int temp=a;
    a=b;
    b=temp;
    cout << "a = " << a << " b = " << b << endl ;
}
void fun(char a,char b)
{
    char temp=a;
    a=b;
    b=temp;
    cout << "a = " << a << " b = " << b << endl ;
}
void fun(double a, double b)
{
    double temp=a;
    a=b;
    b=temp;
    cout << "a = " << a << " b = " << b << endl ;
}
void fun(string a,string b)
{
    string temp=a;
    a=b;
    b=temp;
    cout << "a = " << a << " b = " << b << endl ;
}
void fun(bool a,bool b)
{
    bool temp=a;
    a=b;
    b=temp;
    cout << "a = " << a << " b = " << b << endl ;
}
int main()
{
    fun(1,2);
    fun('a','b');
    fun(1.2,1.5);
    fun("hello","world");
    fun(true,false);
    return 0;
}