最近學習python，於是寫下了如下程式：
import numpy as np
def matrixmultip(a, b):
m = a.shape[0]
n = a.shape[1]
n1 = b.shape[0]
h = b.shape[1]
if(n!=n1):
print("the matrix can't multiply!\n")
return 0
else:
c = np.random.rand(m, h)
for i in range(m):
for j in range(h):
c[i][j] = 0
for k in range(n):
c[i][j] += a[i][k]*b[k][j]
return c
m = np.random.rand(4, 5)
print(m)
n = np.random.rand(5, 3)
print(n)
c = matrixmultip(m, n)
print(c)
[[0.05759342 0.91642957 0.76487463 0.98983764 0.3132928 ]
[0.45148381 0.98424459 0.48097279 0.25893481 0.39565063]
[0.37260015 0.99184222 0.90811488 0.56404501 0.50999819]
[0.42517741 0.75780188 0.92259223 0.97579056 0.71583077]]
[[0.1350007 0.81260325 0.57126273]
[0.13598473 0.70808614 0.46339762]
[0.56981689 0.82154439 0.56143592]
[0.11517964 0.89892064 0.75890407]
[0.52431086 0.15669915 0.62043604]]
[[0.84650603 2.26296833 1.83257031]
[0.70612723 1.75370762 1.42603047]
[1.03499997 2.33809048 1.92679552]
[1.17386643 2.62936837 2.29668665]]
此段程式碼主要是用到了迴圈，而且還考慮了numpy定義陣列的方法。
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