用C++编写三个函数，分别求两个整数、两个浮点数、两个字符中较大的哪一个，并在主函数中调用测试

以下是用C++编写的三个函数，分别求两个整数、两个浮点数、两个字符中较大的哪一个：

#include <iostream>
using namespace std;

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

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

char max(char a, char b) {
    return a > b ? a : b;
}

int main() {
    int i1 = 10, i2 = 20;
    float f1 = 3.14, f2 = 2.71;
    char c1 = 'A', c2 = 'a';
    cout << "Max of " << i1 << " and " << i2 << " is " << max(i1, i2) << endl;
    cout << "Max of " << f1 << " and " << f2 << " is " << max(f1, f2) << endl;
    cout << "Max of " << c1 << " and " << c2 << " is " << max(c1, c2) << endl;
    return 0;
}

输出结果如下：

Max of 10 and 20 is 20
Max of 3.14 and 2.71 is 3.14
Max of A and a is a