string isn't c++ built in type

Hi, I'm a beginner and still learning.

Can i ask why did you include the string library?
Thanks

logical or operator

Coincidentally

太特么聪明了！膜拜~

whats the logic behind it?? pls :(

I don’t think we need to judge to divide by 0. When an incorrect parameter is entered, an error message should be displayed, prompting the inputter that the parameter is incorrect. Otherwise, people who use the function will think that 0 is also a valid divisor. Unless the requirements clearly indicate the need for compatibility with a divisor of 0. :)

When big is 0, an error will be reported, and this answer is not completely correct.

same answer! >v<

I thought my code was the shortest. I didn't expect yours to be shorter, and you didn't even use variables. (Except i)

The explanation was great, and all my doubts were solved!

这个方法很棒，可以减少循环的次数。

// while (len --> 0)
while (len-- > 0)

Space input position changed, almost can't recognize

膜拜大佬。。。