Custom logarithmic function in C++
When I participated in the Blue Bridge Cup provincial competition this year, I needed a logarithmic function based on the base 2 to solve the problem. That is, which depth and maximum is the balance of a binary tree. I immediately thought of using the log2 function. The subscript of the array belongs to which depth. As a result, in the .chm help file of the blue bridge cup, only the log function of log() and log10() is found, and there is no logarithmic function of the custom bottom. Fortunately, at that time, the wit was used to directly find the result of the second from 1 to n.
Today I have to do a logarithmic function. I want to learn it. I found that C++ does not have a custom logarithmic function.
loga(n)/loga(m) = logm(n)
double res = log(n)/log(m); //res = logm(n)
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