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

#include<stdio.h>
#include<stdlib.h>

void Nhap(int **a, 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,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, int **b, int **&c,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;
    int **b;
    int **c;
    a = (int **)malloc(2);
    for (int i = 0; i < 2; ++i)
        a[i] = (int *)malloc(2);
    b = (int **)malloc(2);
    for (int i = 0; i < 2; ++i)
        b[i] = (int *)malloc(2);
    c = (int **)malloc(2);
    for (int i = 0; i < 2; ++i)
        c[i] = (int *)malloc(2);

    Nhap(a,2);
    Nhap(b,2);
    Nhan(a,b,c,2);
    Xuat(c,2);
    system("pause");
    return 0;
}