seq.cpp

#include <bits/stdc++.h>
#include <chrono>

using namespace std;
using namespace std::chrono;

int MAX = 100;
int n;

void print_array(int **a) {
    for (int i = 0; i < n; i++)
    {
        for (int j = 0; j < n; j++)
        {
            cout << a[i][j] << " ";
        }
        cout << endl;
    }

}

milliseconds job( int n)
{
    int **a, **b, **c;
    a = (int**)malloc(n*sizeof(int*));
    b = (int**)malloc(n*sizeof(int*));
    c = (int**)malloc(n*sizeof(int*));
    for (int i = 0; i < n; i++)
    {
        int *x = (int*)malloc(n*sizeof(int));
        for (int j = 0; j < n; j++)
        {
            x[j] = rand()%100;
        }
        a[i] = x;
    }

    for (int i = 0; i < n; i++)
    {
        int *x = (int*)malloc(n*sizeof(int));
        int *y = (int*)malloc(n*sizeof(int));
        for (int j = 0; j < n; j++)
        {
            x[j] = rand()%100;
            y[j] = rand()%100;
        }
        b[i] = x;
        c[i] = y;
    }

   // print_array(a);
   // print_array(b);
    clock_t tic = clock();
    auto strt = duration_cast< milliseconds >(system_clock::now().time_since_epoch());
    for (int i = 0; i < n; i++)
    {
        for (int j = 0; j < n; j++)
        {
            c[i][j]=0;
            for (int k = 0; k < n; k++)
            {
                c[i][j] += a[i][k]*b[k][j];
            }

        }
    }
    auto stop = duration_cast< milliseconds >(system_clock::now().time_since_epoch());
    clock_t tac = clock();
    //printf("Elapsed: %f seconds\n", (double)(tac - tic) / CLOCKS_PER_SEC);
    //print_array(c);
    free(a);
    free(b);
    free(c);
    return stop-strt;
}

int main(int argc, char** argv)
{
    int n = atoi(argv[1]);
    cout << "n : " << n << "time: " << endl;
    job(n);
}