各位大佬帮忙看看怎么写
谢谢了

C++代码，求采纳

1.

#include <bits/stdc++.h>
using namespace std;
int f(int x)
{
   if(x > 5) return sqrt(x * x * x - 4);
   else if(x > 0) return x * x + 3;
}
int main()
{
   int x;
   while(cin >> x)
      cout << f(x);
   return 0;
}

2.

#include <bits/stdc++.h>
using namespace std;
int main()
{
   int a, b, c, d;
   cin >> a >> b >> c >> d;
   cout << ( (a + b + c + d) / 4)
   return 0;
}

3.

#include <bits/stdc++.h>
using namespace std;
int main()
{
   int sump = 0, summ = 0, t;
   for(int i = 0; i < 10; ++i)
   {
      cin >> t;
      if(t > 0) sump += t;
      else summ += t;
   }
   cout << sump << ' ' << summ;
   return 0;
}