你能再解释一下抽象的过程吗？ (1) for i 1 to r (2】 for j 1 to m (3) S=0 (4 for k 1 to n (5) SS A[i,k]B[k,] (6) C[i,j打=s How many multiplications (expressed in terms of r.m.and n)does this pseudocode carry out in total among all the iterations of Line 5? 7=U Tl= U=∑ISl=∑=mn i-l 乘法原则是否是必须明确给出的呢？你能再解释一下抽象的过程吗？ 乘法原则是否是必须明确给出的呢？