function+array add function for the code below to find the sum of secondary elements the sum of element above main diagonal the sum of element below main diagonal the average of all elements in c++ for beginners please

// Example program

#include

#include

#include

#include

using namespace std;

//recursive functions

const int size=10;

void fill(int x[size][size])

{

for (int i=0;i

{

for(int j=0;j

x[i][j]=rand()%66+35;

}

}

void print(int x[size][size])

{

for (int i=0;i

{

for (int j=0;j

cout<< x[i][j]<<"\t";

cout<

}

}

int sum_main_d(int x[size][size])

{

int s=0;

for (int i=0;i

s+=x[i][i];

return s;

}

int main()

{

srand(time(0));

int array1[size][size];

fill(array1);

print(array1);

cout<<"The sum of main diagonal is :"<

}