v c++中的power怎么用啊，总是说我没定义power

Question

#include <stdio.h>
#include <math.h>
int main(void)
{
int money, year;
double interest, rate;

scanf("%d,%d,&ld",&money,&year,&rate);
interest=money*power((1+rate),year);
printf("interest = %.2f\n", interest);
return 0;
}