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除法一般都是減法和移位的綜合體,就像你用豎式算的一樣.裡面每一位要進行的判斷,時間也就用得多.在沒有除法指令的CPU上,也是用類似的程式進行,那就慢得更加多了.在某些優化的情况下,除法可以用乘法代替,但還是比乘法慢. 記得採納啊
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