After compiling of below program , i received the "ms with error".

Please help me.

Thank you,

```
#include<iostream.h>
void main()
{
int a[3][3],i,j,m,n,sum1=0,sum2=0,z;
cout<<"\n Enter the order of the matrices";
cin>>m>>n;
cout<<"\n Enter the elements of the matrices";
for(i=0;i<m;i++)
for(j=0;j<n;j++)
{
if(i==j)
sum1+=a[i][j];
}
for(i=0,j=n-1;i<m;i++,j--)
{
sum2+=a[i][j];
}
cout<<"\n The sum of diagonal elements="<<sum1;
cout<<"\n The sum of subdiagonal elements="<<sum2;
cin>>z;
}
```