.编写重载函数funmax可分别求两个int数、两个float数、两个double数的最大值。

下面是一个示例代码：

#include <iostream>
using namespace std;

int funmax(int a, int b) {
    return a > b ? a : b;
}

float funmax(float a, float b) {
    return a > b ? a : b;
}

double funmax(double a, double b) {
    return a > b ? a : b;
}

int main() {
    int a = 5, b = 7;
    float c = 3.5, d = 4.2;
    double e = 2.6, f = 8.9;

    cout << "max of " << a << " and " << b << " is " << funmax(a, b) << endl;
    cout << "max of " << c << " and " << d << " is " << funmax(c, d) << endl;
    cout << "max of " << e << " and " << f << " is " << funmax(e, f) << endl;

    return 0;
}

输出结果：

max of 5 and 7 is 7
max of 3.5 and 4.2 is 4.2
max of 2.6 and 8.9 is 8.9