函数名: pow
功 能: 指数函数(x的y次方)
用 法: double pow(double x, double y);
程序例:

#include
#include

int main(void)
{
double x = 2.0, y = 3.0;

printf("%lf raised to %lf is %lf\n", x, y, pow(x, y));
return 0;
}