#include<iostream.h>
#include<conio.h>
void main()
{
clrscr();
int r,c,i=0,j=0,sum=0;
int*ptr;
cout<<"Enter row and column of a matrix";
cin>>r>>c;
ptr=new int[r*c];
cout<<endl<<"Enter elements of the matrix";
for(i=0;i<r;i++)
{
for(j=0;j<c;j++)
{
cin>>ptr[i*c+j];
}
}
cout<<endl<<"Matrix form";
cout<<endl;
for(i=0;i<r;i++)
{
for(j=0;j<c;j++)
cout<<ptr[i*c+j]<<'\t';
cout<<endl;
}
for(i=0;i<r;i++)
{
for(j=0;j<c;j++)
{
if(i==j && i+j==r-1)
sum=sum+ptr[i*c+j];
}
}
sum-ptr[r/2*c/2+c/2];
cout<<endl<<"The Sum of diagonal elements of a matrix:"<<sum;
getch();
}
#include<conio.h>
void main()
{
clrscr();
int r,c,i=0,j=0,sum=0;
int*ptr;
cout<<"Enter row and column of a matrix";
cin>>r>>c;
ptr=new int[r*c];
cout<<endl<<"Enter elements of the matrix";
for(i=0;i<r;i++)
{
for(j=0;j<c;j++)
{
cin>>ptr[i*c+j];
}
}
cout<<endl<<"Matrix form";
cout<<endl;
for(i=0;i<r;i++)
{
for(j=0;j<c;j++)
cout<<ptr[i*c+j]<<'\t';
cout<<endl;
}
for(i=0;i<r;i++)
{
for(j=0;j<c;j++)
{
if(i==j && i+j==r-1)
sum=sum+ptr[i*c+j];
}
}
sum-ptr[r/2*c/2+c/2];
cout<<endl<<"The Sum of diagonal elements of a matrix:"<<sum;
getch();
}
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