Обращение к элементам массива структур

#include <iostream>
 
using namespace std;
 
int main()
{
int i,j,k,n=2;
int sr;
struct student
{
char fio[25];
int otc[25];
} mas[10];
for (i=0;i<n;i++)
{
cout << "Fio"<<endl;
cin>>mas[i+1].fio;
cout << "10 otcenok"<<endl;
for (j=0;j<n;j++)
{
cin>>mas[j].otc[j];
}
}
for (k=0;k<n;k++)
{
cout<<"Sredn"<<" "<<mas[k+1].fio<<" "<<endl;
}
}

#include <iostream>
 
using namespace std;
 
#define MAX_SURNAME_LEN             (25)
#define MAX_STUDENT_COUNT           (10)
 
struct STUDENT
{
   char     pszSurname[MAX_SURNAME_LEN + 1];
   int      iEstimate;
};
 
int main()
{
   STUDENT     pStudents[MAX_STUDENT_COUNT];
 
   for (int ii = 0; ii < MAX_STUDENT_COUNT; ++ii)
   {
      cout << "Enter surname and estimate for this student:" << endl;
 
      cin >> pStudents[ii].pszSurname;
      cin >> pStudents[ii].iEstimate;
   }
 
   double   fAverage = 0.0;
 
   for (int jj = 0; jj < MAX_STUDENT_COUNT; ++jj)
   {
      fAverage += (double)pStudents[jj].iEstimate;
   }
 
   if (MAX_STUDENT_COUNT > 0)
   {
      fAverage /= (double)MAX_STUDENT_COUNT;
 
      cout << "Average student estimate is: " << fAverage << endl;
   }
 
   return 0;
}

int      iEstimate;

int      piEstimate[MAX_ESTIMATE_COUNT];

pStudents[ii].fAverage = 0.0;
 
for (int jj = 0; jj < MAX_ESTIMATE_COUNT; ++jj)
{
   pStudents[ii].fAverage += <введенная_оценка>;
}
 
if (MAX_ESTMATE_COUNT > 0)
{
   pStudents[ii].fAverage /= (double)MAX_ESTIMATE_COUNT;
 
   cout << "Average student estimate is: " << pStudents[ii].fAverage << endl;
}

#include <iostream>
 
using namespace std;
 
int main()
{
int i,j,k,n=2;
double sr=0.0, srp=0.0;
struct student
{
char fio[25];
int otc[225];
} mas[10];
for (i=0;i<n;i++)
{
cout << "Name:"<<endl;
cin>>mas[i].fio;
cout <<n<<" evaluations:"<<endl;
for (j=0;j<n;j++)
{
cin>>mas[j].otc[j];
}
}
for (k=0;k<n;++k)
{
    srp=mas[k].otc[k];
    sr+=mas[k].otc[k];
cout<<"Average:"<<" "<<mas[k].fio<<" "<<srp/n<<" "<<sr/n<<endl;
}
}

int main()
{
   STUDENT     pStudents[MAX_STUDENT_COUNT];
 
   for (int ii = 0; ii < MAX_STUDENT_COUNT; ++ii)
   {
      cout << "Enter surname and estimate series for this student:" << endl;
 
      cin >> pStudents[ii].pszSurname;
 
      pStudents[ii].fAverageEstimate = 0.0;
 
      for (int jj = 0; jj < MAX_ESTIMATE_COUNT; ++jj)
      {
         int      iEstimate = 0;
 
         cin >> iEstimate;
 
         pStudents[ii].fAverageEstimate += (double)iEstimate;
      }
 
      pStudents[ii].fAverageEstimate /= (double)MAX_ESTIMATE_COUNT;
 
      cout << "Average student estimate is: " << pStudents[ii].fAverageEstimate << endl;
   }
 
   return 0;
}