Question

Write a C++ program to read two matrices with any size. Your program should have at least the following functions:

1. Main()
2. Read a matrix
3. Add two matrices
4. Subtract two matrices
5. Multiply two matrices
6. Divide two matrices
7. Display a matrix

Answer 1

Below is the solution:

code:

#include<iostream>
#include<string.h>
using namespace std;
class matrix
{
   //declare variable
private:
   int row,col;
   int a[10][10];
public:
   matrix() //set the deafult contructor
   {
       row=0;
       col=0;
   }
   matrix(int r,int c,int g[10][10]) //matric constructor
   {
       row=r;
       col=c;
       for(r=0;r<row;r++)
        for(c=0;c<col;c++)
         a[r][c]=g[r][c];
   }
   void read() //read function
   {
       int r,c;
       cout<<"\nInput the no. of row:";
       cin>>row;
       cout<<"Input the no. of column:";
       cin>>col;
       cout<<"Input the elements:\n";
        for(r=0;r<row;r++)
         for(c=0;c<col;c++)
           cin>>a[r][c];
   }

   int operator==(matrix m) //check for equal matrix size
   {
       if(row==m.row && col==m.col)
        return(1);
       else
        return(0);
   }
   matrix operator+(matrix m) //addition matrix function operator overloading
   {
       int r,c;
       int result[10][10];
       for(r=0;r<row;r++)
        for(c=0;c<col;c++)
         result[r][c]=a[r][c]+m.a[r][c];
         return(matrix(row,col,result));
   }
   matrix operator-(matrix m) //subtraction matrix function operator overloading
   {
       int r,c;
       int result[10][10];
       for(r=0;r<row;r++)
        for(c=0;c<col;c++)
          result[r][c]=a[r][c]-m.a[r][c];
          return(matrix(row,col,result));
   }
   matrix operator/(matrix m) //division matrix function operator overloading
   {
       int r,c;
       int result[10][10];
       for(r=0;r<row;r++)
        for(c=0;c<col;c++)
          result[r][c]=a[r][c]/m.a[r][c];
          return(matrix(row,col,result));
   }
   matrix operator*(matrix m) //multiplication matrix function operator overloading
   {
       int r,c;
       int result[10][10];
       for(r=0;r<row;r++){
        for(c=0;c<col;c++){
           int sum=0;
           for(int k=0; k<row; k++){
               sum += a[r][k] * m.a[k][c];
           }
           result[r][c]=sum;
       }
       }
          return(matrix(row,col,result));
   }
      friend ostream& operator<<(ostream& dout,matrix m); //function to print the matrix
};

ostream& operator<<(ostream &dout,matrix m) //print matrix
{
int r,c;
for(r=0;r<m.row;r++)
{
    for(c=0;c<m.col;c++)
     dout<<m.a[r][c]<<" ";
     cout<<endl;
}
return(dout);
}

int main()
{
   matrix m1,m2,m3,m4,m5,m6; //create object
   cout<<"Input the data to matrix 1\n";
   m1.read(); //read matrix1
   cout<<"Input the data to matrix 2\n";
   m2.read(); //read matrix2
   if(m1==m2)
   {
    //matrix operation
     m3=m1+m2;
     m4=m1-m2;
     m5=m1/m2;
     m6=m1*m2;
     cout<<"The m1 matrix is:\n";
     cout<<m1<<endl;
     cout<<"The m2 matrix is:\n";
     cout<<m2<<endl;
     cout<<"The resultsnt matrix after addition is:\n";
     cout<<m3<<endl;
     cout<<"The resultsnt matrix after subtraction is:\n";
     cout<<m4<<endl;
     cout<<"The resultsnt matrix after division is:\n";
     cout<<m5<<endl;
     cout<<"The resultsnt matrix after multiplication is:\n";
     cout<<m6<<endl;
   }
   else
     cout<<"There is no compatibility of two m,atrix to add or subtract"<<endl;
return 0;
}

output:

Input the data to matrix 1

Input the no. of row:3
Input the no. of column:3
Input the elements:
1 2 3
1 2 3
1 2 3
Input the data to matrix 2

Input the no. of row:3
Input the no. of column:3
Input the elements:
1 2 3
1 2 3
1 2 3
The m1 matrix is:
1 2 3
1 2 3
1 2 3

The m2 matrix is:
1 2 3
1 2 3
1 2 3

The resultsnt matrix after addition is:
2 4 6
2 4 6
2 4 6

The resultsnt matrix after subtraction is:
0 0 0
0 0 0
0 0 0

The resultsnt matrix after division is:
1 1 1
1 1 1
1 1 1

The resultsnt matrix after multiplication is:
6 12 18
6 12 18
6 12 18