C++如何从阵列中提取最值（最大值和最小值同时提取）？

算法思想：先相邻两个两个比较，较大的放入数组max[],较小的放入数组min[],然后从max[]数组求出最大，min[]数组求出最小即可。 可以证明这是效率最高的算法，不能进一步改进。

#include <iostream>
#define n 11
#define m ((n+1)/2)
using namespace std；

void main(void)
{
int num[] = {11,2,3,4,6,5,7,8,9,10,20};
//int n = sizeof(num)/sizeof(num[0]);
//int m = (n+1)/2;
int max[m] , min[m];
int k = 0, j = 0;

if(n/2 != 0) max[m-1] = min[m-1] = num[n-1];

for (int i=0; i < n-1; i = i+2)
{
if (num[i] >= num[i+1])
{
max[j++] = num[i];
min[k++] = num[i+1];
}
else
{
max[j++] = num[i+1];
min[k++] = num[i];
}

}

for( i=0; i< m; i++)
{
cout << "max[" << i << "] = " << max[i] << "\t";
cout << "min[" << i << "] = " << min[i] <<endl;
}