CLASSWORK

#include <iostream>
#include <fstream>
using namespace std;
int main()
{
int i,j;
ofstream fout("fout.txt");
const int n1=2;
const int m1=2;
const int n2=2;
const int m2=2;
int a[n1][m1];
        fout<<"size A="<<n1<<'*'<<m1<<endl;
    for (i=0;i<n1;i++)
{
    for (j=0;j<m1;j++)
        a[i][j]=rand()%10;
}
    for (i=0;i<n1;i++)
{
    for (j=0;j<m1;j++)
        fout<<a[i][j]<<' ';
fout<<endl;
}
fout<<endl;
        int b[n2][m2];
        fout<<"size B="<<n2<<'*'<<m2<<endl;
    for (i=0;i<n2;i++)
{
    for (j=0;j<m2;j++)
        b[i][j]=rand()%10;
}
    for (i=0;i<n2;i++)
{
    for (j=0;j<m2;j++)
        fout<<b[i][j]<<' ';
        fout<<endl;
}
fout.close();
        ifstream fin("fout.txt");
        for (i=0;i<n1;i++)
{
    for (j=0;j<m1;j++)
        fin>>a[i][j];
}
    for (i=0;i<n2;i++)
{
    for (j=0;j<m2;j++)
        fin>>b[i][j];
}
int c[n1][n2];
    if (n1==n2&&m1==m2)
{
    for (i=0;i<n2;i++)
{
    for (j=0;j<m2;j++)
        c[i][j]=a[i][j]+b[i][j];
}
    for (i=0;i<n2;i++)
{
    for (j=0;j<m2;j++)
        cout<<c[i][j]<<' ';
        cout<<endl;
}
}
    else {
        cout<<"can not be folded";
        cout<<endl;
        }
int d[n1][n2],p,s;
        s=0;
    if (n1==m2)
{
    for (i=0;i<n1;i++)
{
    for (j=0;j<m2;j++)
{
        d[i][j]=0;
    for (int k=0;k<n1;k++)
        d[i][j]+=a[i][k]*b[k][j];
}
}
    for (i=0;i<n2;i++)
{
for (j=0;j<m2;j++)
        cout<<d[i][j]<<' ';
        cout<<endl;
}
}
else cout<<"can not be multiplied";
fin.close();
system("pause");
return 0;
}