Adjacent matrix

#include <iostream>
#include <stdlib.h>
#include <time.h>
using namespace std;

int main()
{
    int i,j,n,m[26][26];
    srand(time(NULL));
    char a = 'A' ;


    cout<<"Enter the number of values: ";
    cin>>n;

    for(i=0; i<n; i++)
    {
        for(j=0; j<n; j++)
        {
            m[i][j]=rand()%2;
        }
    }

    for(i=0; i<n; i++)
    {
        for(j=0; j<n; j++)
        {
            cout<<m[i][j]<<" ";
        }
        cout<<endl;
    }

    for(i=0; i<n; i++)
    {
        cout<<endl<<a<<" = ";

        for(j=0; j<n; j++)
        {
            if(m[i][j]==1)
            {
                cout<<(char)('A'+j)<<",";
            }
        }



        a++;
    }

}