Matrix creation by using only one dimensional array

/* compiler- Turbo c++ author- Mangilal Sharma --------------------------------------------------------*/
/* Do work of matrix by using only one dimensional array */
#include <conio.h>
#include <stdio.h>
#include <iostream.h>

void main()
{
 clrscr();
 int m,a[100],n;
 cout<<"Enter no. of rows for matrix:";
 cin>>n;
 cout<<"Enter no. of columns for matrix:";
 cin>>m;
 cout<<"Enter the elements for matrix:\n";
 int k=0;
 for(int i=0;i<n;i++)
 {
  for(int j=0;j<m;j++)
  {
   cout<<"Enter element for matrix location "<<i<<","<<j<<" :";
   cin>>a[k++];
  }
 }
 k=0;
 for(i=0;i<n;i++)
 {
  for(int j=0;j<m;j++)
  {
   cout<<"matrix location for"<<i<<","<<j<<" :";
   cout<<"is"<<&a[k++];cout<<endl;
  }
 }
 int row;
 printf("Which row we show u:");
 scanf("%d",&row);
 k=(row-1)*m;
 {
  for(int j=0;j<m;j++)
  {
   cout<<a[k++];cout<<"\t";
  }
  cout<<endl;
 }
 getch();
}
 /*=========================19Nov.,2011=============================*/