使用时注意类型,可见两者皆不可以用int

1.pow

函数声明:

     double pow (double base     , double exponent);
      float pow (float base      , float exponent);
long double pow (long double base, long double exponent);
     double pow (double base     , int exponent);
long double pow (long double base, int exponent);


2.sqrt

函数声明:

 double sqrt (double x);
      float sqrt (float x);
long double sqrt (long double x);



 

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