函数模板

#include<iostream>
using namespace std;
template<typename T>//定义一个通用函数，T为类型参数


T max(T a, T b, T c)//只能用在参数个数相同，参数类型不同
{
    if (b > a)    a = b;
    if (c > a) a = c;
    return a;
}

int main()
{
    int i1 = 185, i2 = -76, i3 = 567, i;
    double d1 = 56.87, d2 = 90.23, d3 = -3214.78, d;
    long l1 = 67854, l2 = -912456, l3 = 673456, l;

    i = max(i1, i2, i3);
    d = max(d1, d2, d3);
    l = max(l1, l2, l3);

    cout << "i_max=" << i << endl;
    cout << "d_max=" << d << endl;
    cout << "l_max=" << l << endl;
    while (1);
}