求写C语言计算器代码,要求加减乘除,求余数,阶乘,累加,排列,组合

#include#include#includedouble EPS=10E-6;double sum(double a,double b){ return a+b;}double sub(double a,double b){ return a-b;}double mul(double a,double b){ return a*b;}double divv(double a,double b)...