Matrix ( Diagonal Sum )

The coding starts from next line:-

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#include<iostream.h>

#include<conio.h>

void main()

{

int i,j,sum=0,a[3][3];

cout<<"\nEnter the Matrix of 3-3 size:\n";

for(i=0;i<3;i++)

{

for(j=0;j<3;j++)

{

cin>>a[i][j];

}

}

for(i=0;i<3;i++)

 {

 for(j=0;j<3;j++)

  {

  cout<<" "<<a[i][j];

  }

 cout<<"\n";

 }

for(i=0;i<3;i++)

{

 for(j=0;j<3;j++)

  {

   if(i==j)

   {

   sum=sum+a[i][j];

   }

  }

}

cout<<"\n Sum is:"<<sum;

getch();

}