C++ Matrike

#include<iostream.h>
int odstevanje(long A[10][10], long B[10][10],long dolzina , long sirina,long Nova[10][10])
{
	int stevilo=10;
	for(int i=0; i < dolzina; i++)
	{
		for(int j=0; j < sirina; i++)
		Nova[i][j]=0;
		{
			for(int k=0; k < stevilo;k++)
			Nova[i][j]= A[i][k] * B[k][j] + Nova[i][j];
		}
	}
	return 0;
}
int main()
{
    long a[10][10];
    long b[10][10];
	long Nova[10][10];
    long x,y;
    cout<<"Vpisi dolzino stolpca matrike"<<endl;
    cin>>x;
	cout<<"Vpisi sirino stolpca matrike"<<endl;
	cin>>y;
	odstevanje(a,b,x,y,Nova);
    return 0;
}

 #include<iostream>
using namespace std;
void matrikaA(int A[10][10],int B[10][10],int Nova[10][10],int n)
{
	cout << "Vnesi stevilke za prvo matriko"<<endl;
    cout<<endl;
	for (int i = 0 ; i < n ; i++ )
	{
		for (int j = 0 ; j < n ; j++ )
		{
			cin >> A[i][j];
		}
	}
}
void matrikaB(int A[10][10],int B[10][10],int Nova[10][10],int n)
{
	cout << "Vnesi stevilke za drugo matriko"<<endl;
    cout<<endl;
	for (int i = 0 ; i < n ; i++ )
	{
		for (int j = 0 ; j < n ; j++ )
		{
			cin >> B[i][j];
		}
	}
}
void sestevanje(int A[10][10],int B[10][10],int Nova[10][10],int n)
{
	for (int i = 0 ; i < n ; i++ )
	{
		for (int j = 0 ; j < n ; j++ )
		{
			Nova[i][j] = A[i][j] + B[i][j];
		}
	}
	cout << "Vsota matrike A in B je ="<<endl;
    cout<<endl;
    for ( i = 0 ; i < n ; i++ )
    {
		for (int j = 0 ; j < n ; j++ )
        cout << Nova[i][j] << "\t"; // \t je tabulator
		cout << endl;
	}
}
void odstevanje(int A[10][10],int B[10][10],int Nova[10][10],int n)
{
	for (int i = 0 ; i < n ; i++ )
    for (int j = 0 ; j < n ; j++ )
    Nova[i][j] = A[i][j] - B[i][j];
	cout << "Razlika matrike A in B je ="<<endl;
    cout<<endl;
    for ( i = 0 ; i < n ; i++ )
    {
		for (int j = 0 ; j < n ; j++ )
        cout << Nova[i][j] <<"\t";  // \t je isto kot da bi stisno tabulator noter tabulator
		cout << endl;
	}
}
void mnozenje(int A[10][10],int B[10][10],int Nova[10][10],int n)
{
	for (int i=0 ; i<n ; i++ )
	{
		for (int j=0 ; j<n ; j++ )
		{
			for(int k=0; k<n; k++)
			{
				Nova[i][j]=A[i][k]*B[k][j];
			}
		}
	}
	cout << "Mnozenje matrik A in B je ="<<endl;
	cout<<endl;
	for ( i=0 ; i<n ; i++ )
	{
		for (int j=0 ; j<n ; j++ )
		cout << Nova[i][j] <<"\t";  // \t je isto kot da bi stisno tabulator noter tabulator
		cout << endl;
	}
}

int main()
{
   int m,A[10][10], B[10][10], Nova[10][10];
   cout << "Vnesi dolzino in sirino matrike "<<endl;
   cin >> m ;
   cout<<endl;
   matrikaA(A,B,Nova,m);
   matrikaB(A,B,Nova,m);
   sestevanje(A,B,Nova,m);
   odstevanje(A,B,Nova,m);
   mnozenje(A,B,Nova,m);
}