程序代码：

#include <cstring>

inline int mymax( int a, int b )
{
    return a>=b ? a : b;
}

inline double mymax( double a, double b )
{
    return a>=b ? a : b;
}

inline const char* mymax( const char* a, const char* b )
{
    return strcmp(a,b)>=0 ? a : b;
}

inline int mymax( const int arr[], size_t n )
{
    if( n == 0 )
        return 0;

    int ret = arr[0];
    for( int i=1; i!=n; ++i )
        if( arr[i] > ret )
            ret = arr[i];
    return ret;
}

#include <iostream>
using namespace std;

int main()
{
    cout << mymax(8,9) << endl;
    cout << mymax(2.0,3.0) << endl;
    cout << mymax("sdf","sad") << endl;

    int arr[] = { 1, 2, 3 };
    size_t n  = sizeof(arr)/sizeof(arr[0]);
    cout << mymax(arr,n) << endl;

    return 0;
}