程序代码：

#include <iostream>

int getMax(int aArray[],int& nLen)
{
    if (1 == nLen) return aArray[0];

    int nMax = aArray[0];
    for (int i = 1; i < nLen; i++)
    {
        if (nMax < aArray[i]) nMax = aArray[i];
    }

    return nMax;
}
int main()
{
    int aArray[] = {1,4,2,3,8,5,10,9};
    int nLen =(int)sizeof(aArray)/sizeof(int);

    int nMax = getMax(aArray,nLen);
    std::cout<<"Max = "<<nMax<<std::endl;

    return 0;
}