如何确定C中整数的位数? [英] How do I determine the number of digits of an integer in C?

问题描述

例如

n = 3432, result 4

n = 45, result 2

n = 33215, result 5

n = -357, result 3

我想我可以把它变成一个字符串然后得到字符串的长度，但这看起来很复杂而且很麻烦.

I guess I could just turn it into a string then get the length of the string but that seems convoluted and hack-y.

推荐答案

floor (log10 (abs (x))) + 1

http://en.wikipedia.org/wiki/Logarithm

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