有几道题不会 帮忙做一下把！

第五：
#include <iostream>
using namespace std;
int main()
{
     int a[3][3] = {19, 18, 17, 16, 15, 14, 13, 12, 11};
     int b[3][3] = {1, 2, 3, 4, 5, 6, 7, 8, 9};
     int c[3][3];
     for (int i=0; i<3; ++i)
     {
         for (int j=0; j<3; ++j)
         {
             c[i][j] = a[i][j] + b[i][j];
             cout << c[i][j] << " ";
             if ( j == 2 )
             {
                 cout << endl;
             }
         }
     }
     return 0;
}

第六题：
#include <iostream>
using namespace std;
void Max(int i, int j, int k)
{
     int maxTemp = 0;
     if (i > j)
     {
         maxTemp = i;
     }
     else
     {
         maxTemp = j;
     }
     if (k > maxTemp)
     {
         maxTemp = k;
     }
     cout << maxTemp << endl;
}
int main()
{
     int i;
     int j;
     int k;
     cin >> i >> j >> k;
     Max(i, j, k);
     return 0;
}