matrix manipulation using operator overloading

#include<iostream>
#include<conio.h>
#include<process.h>
int n;
class matrix
{
public:
int a[10][10];

void get()
{
cout<<"\nEnter the values in the matrix:\n\n";
for(int i=0;i<n;i++)
{
for(int j=0;j<n;j++)
{
cin>>a[i][j];
}
}
}
void show()
{
for(int i=0;i<n;i++)
{
for(int j=0;j<n;j++)
{
cout< }
}
}
matrix operator +(matrix m3)
{
matrix temp;
for(int i=0;i<n;i++)
{
for(int j=0;j<n;j++)
{
temp.a[i][j]=m3.a[i][j]+a[i][j];
}
}
return temp;
}
matrix operator -(matrix m4)
{
matrix temp1;
for(int i=0;i<n;i++)
{
for(int j=0;j<n;j++)
{
temp1.a[i][j]=a[i][j]-m4.a[i][j];
}
}
return temp1;
}

};
void main()
{
system("cls")
cout<<"\n enter the size of the matrix";
cin>>n;
matrix m1,m2,m5;
m1.get();
m2.get();
m5=m1+m2;
cout<<"\n added matrix is";
m5.show();
m5=m1-m2;
cout<<"\n subtracted matrix is ";
m5.show();
getch();
}