WAP to find small no in matrix

#include<iostream.h>

#include<conio.h>

void main()

{

 int a[5][5],n,m,i,j,small;

 cout<<"\n enter size of rows :";

 cin>>n;

 cout<<"\n enter size of collumns  :";

 cin>>m;

 cout<<"\n enter element of 2d array :";

for(i=1;i<=n;i++)

{

for(j=1;j<=m;j++)

{

cin>>a[i][j];

}

}

 cout<<"\n 2d array \n\n\n:";

for(i=1;i<=n;i++)

{

for(j=1;j<=m;j++)

{

cout<<"\t"<<a[i][j];

}

cout<<"\n";

}

 small=a[1][1];

 for(i=2;i<=n;i++)

 {

for(j=1;j<=m;j++)

{

if(small>a[i][j])

{

small=a[i][j];

}

}

 }

 cout<<"\n The smallest element is "<<small;

 getch();

 clrscr();

}