#include"stdio.h"

#include"conio.h"

#include"iostream.h"

#include"iomanip.h"

#include"math.h"

class matran;

class vecto;

class matran

    {

            private:

                    int a[50][50];

                        int n,m;

                public:

                    friend void docmt(char *tentep,matran &mt);

                        friend void ghimt(char *tentep);

                        void nhapmt();

                        void xuatmt();

                        friend void tichvtmt(matran mt,vecto vt,vecto &t,int &kt);

                    friend void tichmtvt(matran mt,vecto vt,vecto &t,int &kt);

                };

class vecto

    {

            private:

                    int a[50];

                public:

                    friend void docvt(char *tentep,vecto &vt);

                        friend void ghivt(char *tentep);

                        void nhapvt();

                        void xuatvt();

                        friend void tichvtmt(matran mt,vecto vt,vecto &t,int &kt);

                        friend void tichmtvt(matran mt,vecto vt,vecto &t,int &kt);

                };

void matran::nhapmt()

    {

            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 docmt(char *tentep,matran &mt)

        {

            FILE *f;

                f=fopen(tentep,"rb");

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

                fclose(f);

                }

void taofile_mt(char *tentep)

    {

            FILE *f;

                matran tg;

                f=fopen(tentep,"wb");

                cout<<"

Nhap ma tran:";

                    tg.nhapmt();

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

                        fclose(f);

                }

void matran::xuatmt()

    {

            int i,j;

                for(i=1;i<=n;i++)

                {

                    cout<<"

";

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

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

                }

           }

void xuatfile_mt(char *tentep)

    {

            FILE *f;

                matran tg;

                f=fopen(tentep,"rb");

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

                cout<<"

Ma tran la:";

                    tg.xuatmt();

                fclose(f);

        }

void vecto::nhapvt()

    {

                cout<<"

Nhap so phan tu cho vecto:"; cin>>n;

                for(i=1;i<=n;i++)

                {

                    cout<<"

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

                        cin>>a[i];

                        }

        }

void docvt(char *tentep,vecto &vt)

    {

            FILE *f;

                f=fopen(tentep,"rb");

                   fread(&vt,sizeof(vecto),1,f);

                fclose(f);

                }

void taofile_vt(char *tentep)

    {

            FILE *f;

                   vecto tg;

                f=fopen(tentep,"wb");

                cout<<"

Nhap vecto:";

                    tg.nhapvt();

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

                fclose(f);

                }

void vecto::xuatvt()

    {

                for(i=1;i<=n;i++)

                cout<<setw(5)<<a[i];

                }

void xuatfile_vt(char *tentep)

    {

            FILE *f;

                   vecto tg;

                f=fopen(tentep,"rb");

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

                cout<<"

Vec to la:";

                    tg.xuatvt();

                        fclose(f);

        }

void tichmtvt(matran mt,vecto vt,vecto &t,int &kt)

    {

            int i,j;

                if(vt.n==mt.n)

                {

                    kt=1;

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

                        {       t.a[i]=0;

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

                       t.a[i]=t.a[i]+mt.a[i][j]*vt.a[j];

                        }

                                t.n=mt.m;

                        }

                        else

                            kt=0;

                }

void tichvtmt(matran mt,vecto vt,vecto &t,int &kt)

    {

            int i,j;

                if(vt.n==mt.n)

                {

                    kt=1;

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

                        {       t.a[j]=0;

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

                       t.a[j]=t.a[j]+vt.a[i]*mt.a[i][j];

                        }

                                t.n=mt.m;

                        }

                        else

                            kt=0;

                }

void main()

    {

                char *tentep1;char *tentep2;

            matran mt;

                vecto vt,t;

                int kt;

                clrscr();

                cout<<"

Nhap ten file:";gets(tentep1);

                taofile_mt(tentep1);

                cout<<"

Nhap ten file:"; gets(tentep2);

                taofile_vt(tentep2);

                cout<<"

Du lieu tu file:";

                xuatfile_mt(tentep1);

                xuatfile_vt(tentep2);

                cout<<"

";

                docmt(tentep1,mt);

                docvt(tentep2,vt);

                cout<<"

Du lieu tu lop:";

                cout<<"

Ma tran la:";

                mt.xuatmt();

                cout<<"

Vecto la:";

                vt.xuatvt();

                tichmtvt(mt,vt,t,kt);

                if (kt==1)

                {

                    cout<<"

Tich cua ma tran va vecto la:";

                        t.xuatvt();

                        }

                else

                    cout<<"

Khong tinh dc tich";

                tichvtmt(mt,vt,t,kt);

                if (kt==1)

                {

                    cout<<"

Tich cua vecto va ma tran la:";

                        t.xuatvt();

                        }

                else

                    cout<<"

Khong tinh dc tich";

                        getch();

        }