#include"stdio.h"

#include"conio.h"

#include"iostream.h"

#include"iomanip.h"

#include"math.h"

class matran

    {

            private:

                    int a[50][50];

                        int n,m;

                public:

                        friend void doc(char *tentep,matran &mt1,matran &mt2);

                        friend void ghi(char *tentep);

                        void nhap();

                        void xuat();

                        int tongdcchinh();

                        int tongdcphu();

                        void sxtang_cot();

                        void sxdcchinh();

                        friend void tongmt(matran mt1,matran mt2,matran &t,int &kt);

                        friend void tichmt(matran mt1,matran mt2,matran &t,int &kt);

                };

void matran::nhap()

    {

            int i,j;

                cout<<"

Nhap so hang n="; cin>>n;

                cout<<"

Nhap so cot m="; cin>>m;

                for(i=1;i<=n;i++)

                for(j=1;j<=m;j++)

                {

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

                        cin>>a[i][j];

                        }

        }

void doc(char *tentep,matran &mt1,matran &mt2)

        {

            FILE *f;

                f=fopen(tentep,"rb");

                   fread(&mt1,sizeof(matran),1,f);

                fread(&mt2,sizeof(matran),1,f);

                fclose(f);

                }

void taofile(char *tentep)

    {

            FILE *f;

                matran tg;

                f=fopen(tentep,"wb");

                   cout<<"

Nhap ma tran A:";

                    tg.nhap();

                fwrite(&tg,sizeof(matran),1,f);

                cout<<"

Nhap ma tran B:";

                    tg.nhap();

                fwrite(&tg,sizeof(matran),1,f);

                        fclose(f);

                }

void matran::xuat()

    {

            int i,j;

                for(i=1;i<=n;i++)

                {

                    cout<<"

";

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

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

                }

        }

void xuatfile(char *tentep)

    {

            FILE *f;

        matran tg;

                f=fopen(tentep,"rb");

                fread(&tg,sizeof(matran),1,f);

                cout<<"

Ma tran A la:";

                    tg.xuat();

        fread(&tg,sizeof(matran),1,f);

                cout<<"

Ma tran B la:";

                    tg.xuat();

                fclose(f);

        }

int matran::tongdcchinh()

    {

            int i,j,s;

                s=0;

                for(i=1;i<=n;i++)

                for(j=1;j<=m;j++)

                    if(a[i][j]==a[i][i])

                        s=s+a[i][i];

                        return s;

                }

int matran::tongdcphu()

    {

            int i,j,s1;

                s1=0;

                for(i=1;i<=n;i++)

                for(j=1;j<=m;j++)

                if(a[i][j]==a[i][n-i+1])

                    s1=s1+a[i][n-i+1];

                    return s1;

        }

void matran::sxtang_cot()

    {

            int i,j,tg,k;

                for(j=1;j<=m;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::sxdcchinh()

    {

             int i,j,tg;

             for(i=1;i<n;i++)

             for(j=i+1;j<=m;j++)

             if(a[i][i]>a[j][j])

             {

                 tg=a[i][i];

                a[i][i]=a[j][j];

                a[j][j]=tg;

                }

             }

void tongmt(matran mt1,matran mt2,matran &t,int &kt)

    {

            int i,j;

                if(mt1.n==mt2.n && mt1.m==mt2.m)

                {

                    kt=1;

                        for(i=1;i<=mt1.n;i++)

                        for(j=1;j<=mt1.m;j++)

                            t.a[i][j]=mt1.a[i][j]+mt2.a[i][j];

                                t.n=mt1.n;

                                t.m=mt1.m;

                        }

                        else

                            kt=0;

                }

void tichmt(matran mt1,matran mt2,matran &t,int &kt)

    {

            int i,j,k;

                if(mt1.m==mt2.n)

                {

                    kt=1;

                        for(i=1;i<=mt1.n;i++)

                        for(j=1;j<=mt2.m;j++)

                        {

                            t.a[i][j]=0;

                                for(k=1;k<=mt2.n;k++)

                                t.a[i][j]=t.a[i][j]+mt1.a[i][k]*mt2.a[k][j];

                        }

                t.n=mt1.n;

                t.m=mt2.m;

                }

                else

                    kt=0;

                }

void main()

    {

                char *tentep1;

        matran mt1,mt2,mt3,tong,tich;

                int kt;

                clrscr();

                cout<<"

Nhap ten file:";gets(tentep1);

                taofile(tentep1);

                cout<<"

Du lieu tu file la:";

                xuatfile(tentep1);

                cout<<"

";

                doc(tentep1,mt1,mt2);

                cout<<"

Du lieu tu lop:";

                cout<<"

Ma tran A:";

                mt1.xuat();

                cout<<"

Ma tran B:";

                mt2.xuat();

                cout<<"

Tong cac phan tu tren duong cheo chinh ma tran A la:"<<mt1.tongdcchinh();

                cout<<"

Tong cac phan tu tren duong cheo phu ma tran A la:"<<mt1.tongdcphu();

                    mt1.sxtang_cot();

                cout<<"

Sap xep ma tran tang dan tren cot ma tran A:";

                mt1.xuat();

                mt2.sxdcchinh();

                cout<<"

Sap xep duong cheo chinh cua ma tran B tang dan:";

                mt2.xuat();

                tongmt(mt1,mt2,tong,kt);

                if (kt==1)

                {

                    cout<<"

Ma tran tong la:";

                        tong.xuat();

                        }

                else

                    cout<<"

Khong tinh dc tong";

                tichmt(mt1,mt2,tich,kt);

                if(kt==1)

                {

                    cout<<"

Ma tran tich la:";

                        tich.xuat();

                        }

                else

                    cout<<"

Khong tinh dc tich";

                        getch();

        }