[問題] 矩陣乘法

看板C_and_CPP作者nigetai (M7)時間14年前 (2010/05/11 02:13)推噓4(4推 0噓 15→)

留言19則, 6人參與討論串1/1

我又來問問題了,這次是矩陣乘法>"< code: http://paste.plurk.com/show/250403/ 這次指定要做A[5][4] * B[4][5] = C[5][5] 爬了版上一些文,然後做了一些code的修改可以順利的跑出來結果了,但是卻計算錯誤>"< 我測試的是這兩個矩陣的相乘: A[5][4] = {{4, 3, 2, 1}, {3, 4, 1, 2}. {2, 3, 4, 1}, {1, 2, 3, 4}, {4, 1, 2, 3}} B[4][5] = {{5, 4, 3, 2, 1}, {4, 5, 1, 2, 3}, {3, 4, 5, 1, 2}, {2, 3, 4, 5, 1}} 正確的C[5][5] = {{40, 42, 29, 21, 18}, {38, 42, 26, 25, 19}, {36, 42, 33, 19, 20}, {30, 38, 36, 29, 17}, {36, 38, 35, 27, 14}} 可是我跑出來的是C[5][5] = {{2, 3, 4, 5, 1}, {4, 6, 8, 10, 2}, {2, 3, 4, 5, 1}, {8, 12, 16, 20, 4}, {6, 9, 12, 15, 3}} 找了很久還是不知道是哪裡出錯..... 麻煩請各位前輩解答>"< -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 140.114.219.129

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