popravni-2014-zad3-Proizvod Matrica

#include <iostream>
#include <vector>
#include <stdexcept>
#include <iomanip>


using namespace std;

vector<vector<double>> ProizvodMatrica (vector<vector<double>> m1, vector<vector<double>> m2)
{
    for (int i=0; i<m1.size(); i++) {
        if (m1[0].size()!=m1[i].size())
            throw domain_error ("Parametar nema formu matrice.");
    }
     for (int i=0; i<m2.size(); i++) {
        if (m2[0].size()!=m2[i].size())
            throw domain_error ("Parametar nema formu matrice.");
    }
    if (m1[0].size()!=m2.size())
        throw domain_error ("Matrice nisu saglasne za mnozenje.");
    vector<vector<double>> m3(m1.size(),vector<double> (m1[0].size()));
    for (int i=0; i<m1.size(); i++)
        for (int j=0; j<m2[0].size(); j++)
        {
            double suma{0};
            for (int k=0; k<m2.size(); k++)
                suma+=m1[i][k]*m2[k][j];
            m3[i][j]=suma;
        }

    return m3;
}
int main () {
    vector<vector<double>> m1{{1,2,3},{4,5,6},{7,8,9}};
    for (int i=0; i<3; i++) {
        for (int j=0; j<3; j++)
            cout<<setw(8)<<m1[i][j];
        cout<<endl;
    }
    cout<<endl;
    vector<vector<double>> m2{{2,1,1},{3,6,4},{1,4,7}};
     for (int i=0; i<3; i++) {
        for (int j=0; j<3; j++)
            cout<<setw(8)<<m2[i][j];
        cout<<endl;
    }
    cout<<endl;
    cout<<"Proizvod tih matrica: "<<endl;
    try{
        vector<vector<double>> m3{ProizvodMatrica(m1,m2)};
        for (int i=0; i<m3.size(); i++) {
            for (int j=0; j<m3[i].size(); j++)
                cout<<setw(8)<<m3[i][j];
            cout<<endl;
        }
    }
    catch (const char poruka []) {
    cout<<poruka;
    }
    return 0;
}