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PROGRAM mul
USE naivmat
USE bettmat
USE dotmat
IMPLICIT none
real(kind=4), dimension(:,:), allocatable :: mat1, mat2, res1, res2
call init_random_seed()
allocate(mat1(10,10))
allocate(mat2(10,10))
allocate(res1(10,10))
allocate(res2(10,10))
call random_number(mat1)
call random_number(mat2)
print *, "mat1:", char(10), mat1
print *, "mat2:", char(10), mat2
res1 = naivmull(mat1, mat2)
res2 = matmul(mat1, mat2)
print *, "res:", char(10), res1
print *, "res_diff:", char(10), res1 - res2
CONTAINS
SUBROUTINE init_random_seed()
integer :: i, n, clock
integer, dimension(:), allocatable :: seed
call random_seed(size = n)
allocate(seed(n))
call system_clock(count = clock)
seed = clock + 37 * (/ (i - 1, i = 1, n) /)
call random_seed(put = seed)
END SUBROUTINE init_random_seed
END PROGRAM mul
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