[Nhan 2 ma tran] ban 0(n^3) v2

#include<stdio.h>
#include<stdlib.h>
const int N = 2;
void Nhap(int a[][N], int n)
{
        for (int i = 0; i < n; ++i)
        {
                for (int j = 0; j < n; ++j)
                {
                        printf("[%d][%d] = ", i,j);
                        scanf("%d",&a[i][j]);
                }
        }

}
void Xuat(int a[][N],int n)
{
        for (int i = 0; i < n; ++i)
        {
                for (int j = 0; j < n; ++j)
                {
                        printf("%d ", a[i][j]);
                }
                printf("; ");
        }
        printf("\n");
}
int Nhan(int a[][N], int b[][N], int c[][N],int n)
{

        for (int i = 0; i < n; ++i)
        {
                for (int j = 0; j < n; ++j)
                {
                        int sum = 0;
                        for (int k = 0; k < n; ++k)
                        {
                                sum += a[i][k]*b[k][j];
                        }
                        c[i][j] = sum;
                }
        }
        return 0;
}
int main(int argc, char const *argv[])
{
        int m,n;
        int a[][N] = {{1,2},{3,4}};

        int b[][N] = {{5,6},{7,8}};
        int c[][N] = {{},{}};
        Nhan(a,b,c,2);
        Xuat(c,2);
        system("pause");
        return 0;
}