Calculate the result of every student of each section

Marks for each subject of every student of each section must be taken from the user.
Calculate the result of every student of each section as follows:
1. Obtained marks (Sum of all courses marks). Max. marks of each subject are 100
2. Percentage
Source Code :
#include <iostream>
#include <iomanip>
using namespace std;
int main()
{
int x[3][8][5];

Task 4 :
Exercise 4
Write a C++ program, that read 12 integer values from user, store values in Matrix of 4 X 3.
Create another Matrix of 4 X 3, divide each element of Matrix1 by five, and store the result in the
Matrix2.
Print Matrix A, with heading shown, correctly spaced.
Print Matrix B, with heading shown, correctly spaced.
Your Program should display output as follows:
Source Code :
#include <iostream>
#include <iomanip>
using namespace std;
int main()
{
int m[4][3];
double n[4][3];
cout<<setw(35)<<setfill('=')<<"="<<endl;
cout<<" Enter Values for matrice A "<<endl;
cout<<setw(35)<<setfill('=')<<"="<<endl;
for(int i=0;i<4;i++)
{
for(int j=0;j<3;j++)
{
cout<<"Value of ["<<i<<"]["<<j<<"] is ";
cin>>m[i][j];
}
}
//dividing 1st matrices by 5 nd saving in 2nd matrices
for(int i=0;i<4;i++)
{
for(int j=0;j<3;j++)
{
n[i][j]=m[i][j]/5.00;
}
}

cout<<setw(35)<<setfill('=')<<"="<<endl;
cout<<" Matrix A- Divided by 5 "<<endl;
cout<<setw(35)<<setfill('=')<<"="<<endl<<endl<<endl;
//print values of 2nd matrices after dividing by 5
for(int i=0;i<4;i++)
{
for(int j=0;j<3;j++)
{
cout<<n[i][j]<<" ";
}
cout<<endl;
}
return 0;
}
Output :
Task 5 :