LXSNeversayNever

摘要： 取绝对值，x需为double型，若为int型可乘一个1.01.double fabs(double x) 向上取整，返回小于或等于x的最大整数，如floor(10.5) == 10.0 floor(-10.5) == -11.02.double floor(double x) 向下取整，返回大于x的 阅读全文

摘要： problem description： A number sequence is defined as follows:f(1) = 1, f(2) = 1, f(n) = (A * f(n - 1) + B * f(n - 2)) mod 7.Given A, B, and n, you are 阅读全文