函数模板

声明与定义函数模板

#include <iostream>  
using namespace std;
template <class T> void swap_new(T& a, T& b);


int main() {
    int a = 1, b = 2;
    float c = 1.5, d = 3.6;

    swap_new(a, b);
    swap_new(c, d);

    cout << a << " " << b << endl;
    cout << c << " " << d << endl;
 
    return 0;
}

template <class T> void swap_new(T& a, T& b) {
    T c = a;
    a = b;
    b = c;
}

运行结果：