1 double pow ( double base, double exponent ); 2 long double pow ( long double base, long double exponent ); 3 float pow ( float base, float exponent ); 4 double pow ( double base, int exponent ); 5 long double pow ( long double base, int exponent );
double sqrt ( double x );
float sqrt ( float x );
long double sqrt ( long double x );
注意参数类型应该正确