```
/*
unable to return value from following function due to if - else block within function..*/
mat operator + (mat &m1,mat &m2) //mat is a class for matrix object
{
int r1=m1.getrow(); //getrow returns number of rows in matrix
int r2=m2.getrow();
int c1=m1.getcol(); //getcol returns number of columns in matrix
int c2=m2.getcol();
if((r1!=r2)||(c1!=c2))
{
cout<<endl<<"Addition not possible.";
}
else
{
mat m3(r1,c1);
for(int i=0;i<r1;i++)
{
for(int j=0;j<c1;j++)
{
m3.get_element(i,j,m1.get_element()+m2.get_element());
}
}
}
}
```