#include"conio.h"

#include"iostream.h"

#include"string.h"

#include"iomanip.h"

#include"stdio.h"

class matran

{ private:int a[50][50];

int n;

public:void doc(char *tentep);

void xuat();

void tangcot();

void max();

};

void taofile(char *tentep)

{FILE *f;

int i,j,n,so;

f=fopen(tentep,"wb");

cout<<"

nhap so phan tu cua ma tran n=";

cin>>n;

putw(n,f);

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

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

{cout<<"["<<i<<"]["<<j<<"]=";

cin>>so;

putw(so,f);

}

fclose(f);

}

void matran::xuat()

{int i,j;

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

{cout<<"

";

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

cout<<setw(5)<<a[i][j];

}

}

void matran::doc(char *tentep)

{FILE *f;

int i,j;

f=fopen(tentep,"rb");

n=getw(f);

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

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

a[i][j]=getw(f);

fclose(f);

}

/*void matran::tangcot()

{int i,j,k,tg;

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

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

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

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

{tg=a[i][j];

a[i][j]=a[k][j];

a[k][j]=tg;

}

}

}

void matran::max()

{int i,j,max;

max=a[1][1];

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

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

{ if(i==j)

{if(max<a[i][j])

max=a[i][j];

}

}

cout<<"

phan tu lon nhat tren duong cheo chinh la "<<max;

} */

void main()

{clrscr();

matran mt;

char *tentep;

cout<<"

nhap ten file: ";

gets(tentep);

taofile(tentep);

mt.doc(tentep);

cout<<"

ma tran vua nhap la";

mt.xuat();

/*cout<<"

ma tran sau khi xep tang theo cot la:";

mt.tangcot();

mt.xuat();

mt.max();*/

getch();

}