使用math库函数计算数值

#include <stdio.h>

#include <math.h>

int main()

{

 float a = 2.78f,d=0.8888;

 int b = 90;

 int c = 5;

 printf("cos(%f)=%f\n", 2.78, cos(2.78));

 printf("log10(%d)=%f\n",90, log10(90));

 printf("sqrt(%d)=%f\n",5, sqrt(5));

 printf("exp(%f)=%f\n",0.8888, exp(0.8888));

 return 0;

}