How can i programe this function without rem or mod?

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haider khan 2021-10-28

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https://ww2.mathworks.cn/matlabcentral/answers/1574108-how-can-i-programe-this-function-without-rem-or-mod

评论： Walter Roberson 2021-10-28

the matlab programe ( function, one loop or two loops ) needs to solve for the quotient remainder theorem a = dq + r

where the programe takes two integers as inputs the dividend a, and the divisor d, processes them, and calculates the quotient q and the remainder 'r' as defined by the division algorithm. q, and r need to be two formal outputs of this program forany given pair, a, and d.

The program MUST NOT use mod, rem, floor, ceil, round, fix.

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Answer 1

Walter Roberson 2021-10-28

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https://ww2.mathworks.cn/matlabcentral/answers/1574108-how-can-i-programe-this-function-without-rem-or-mod#answer_819073

在 MATLAB Online 中打开

a = 1 : 25
a = 1×25
     1     2     3     4     5     6     7     8     9    10    11    12    13    14    15    16    17    18    19    20    21    22    23    24    25
d = randi([2 15])
d = 6
t = int32(a) - int32(a) / int32(d) * int32(d);
t(t < 0) = t(t<0) + d
t = 1×25
   1   2   3   4   5   0   1   2   3   4   5   0   1   2   3   4   5   0   1   2   3   4   5   0   1
int32(mod(a, d))
ans = 1×25
   1   2   3   4   5   0   1   2   3   4   5   0   1   2   3   4   5   0   1   2   3   4   5   0   1

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haider khan 2021-10-28

i need to write a matlab programe, uing a function, without using mod.

Walter Roberson 2021-10-28

In the above, the call to mod() I used was to cross-check the output in t in order to show that the calculation I did produces the same output as mod() -- and thus that mod() is not needed.

The work is done in the two assignments to t . You can convert that work into a function.

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