double AddMatrix(double x[][5], double y[][5])
{
 double matsum[5][5];
 int row, col;
 for(row=0; row<5; row++)
  for(col=0; col<5; col++)
  {
   matsum[5][5]=(x[row][col]+y[row][col]);
  }
 
return matsum[5][5];
}

/*--------------------------------------------------------------------*/
/*  Final Exam- Matrix Operations                                     */
/*                                                                    */
/*  This program will take two data files, open them, read them, save */
/*  their data in arrays, then let the user choose if they want to    */
/* add, subtract, or multiply the matrices as many times as they want*/
/* until they choose the "quit" option, and show the results.        */
/*                   */
#include <iostream>  //Include the necessary libraries.
#include <cstdlib>
#include <fstream>
#include <string>
using namespace std;
 
double AddMatrix(double x[][5], double y[][5]);
// Function Prototype(s) Will Go Here
//Begin main function
int main()
{
const int nrows=5;  //Define the necessary constants
const int ncols=5;
//Define variables
 double Matrix1Info[nrows][ncols];
 double Matrix2Info[nrows][ncols];
 char ch;
 int row, col;
 ifstream matrix, matrix2;
 string filename, filename2;
 
//  Ask user for name of input file 1.
   cout << "Enter first input file: " <<endl;
   cin >> filename;
//  Open file and read the info.
 
   matrix.open(filename.c_str()); 
   if( matrix.fail() )            
   {
        cout << "Error opening input file\n";
   }
   else
   {
    for (row=0; row<nrows; row++)
      for (col=0; col<ncols; col++)
         matrix >> Matrix1Info[row][col]; //Stores info into first matrix array
   for(int r=0; r<5; r++)
   {
    for(int c=0; c<5; c++)
    {
     cout << Matrix1Info[r][c] << ' ';
    }
    cout << endl;
   }
   cout << "Enter second input file: " <<endl; //Gets 2nd matrix file
   cin >> filename2;
   matrix2.open(filename2.c_str()); //Opens 2nd file
   if( matrix2.fail() )            
   {
        cout << "Error opening input file\n";
   }
   else
   {
 for (row=0; row<nrows; row++)
  for(col=0; col<ncols; col++)
         matrix2 >> Matrix2Info[row][col]; //Stores info into 2nd matrix array
   for(int f=0; f<5; f++)
   {
    for(int g=0; g<5; g++)
    {
     cout << Matrix2Info[f][g] << ' ';
    }
    cout << endl;
   }
cout << "Enter A for addition, S for subtraction, M for multiplication, or Q to quit: " << endl;
  cin >> ch;
  while(ch != 'Q')
  {
   switch(ch)
   {
   case 'A':
    cout << AddMatrix << endl;
    cout << "Enter A for addition, S for subtraction, M for multiplication, or Q to quit: " <<endl;
   case 'S':
    //function for subtraction goes here
   case 'M':
    //function for multiplication goes here
    break;
   default:
    cout << "Invalid operation choice." << endl;
    cout << "Enter A for addition, S for subtraction, M for multiplication, or Q to quit: " <<endl;
   }//end switch
  cin >> ch;
  }//end while loop
   }
 
   }
 
 
 
 
 
 
 
//End of main file.
return 0;
}
double AddMatrix(double x[][5], double y[][5])
{
 double matsum[5][5];
 int row, col;
 const int nrows=5;
  const int ncols=5;
 for(row=0; row<5; row++)
  for(col=0; col<5; col++)
  {
   matsum[nrows][ncols]=(x[row][col]+y[row][col]);
  }
 
return matsum[5][5];
}

matsum[5][5]=(x[row][col]+y[row][col]);

matsum[row][col]=(x[row][col]+y[row][col]);