As shown in figure, why initialization barrels to 100, the printing results for 103 barrels.

CodePudding user response:

 void rehash (size_type _Buckets) 
{//rebuild table with the at further _Buckets buckets 
Size_type _Maxsize=_Vec. Max_size ()/4; 
Size_type _Newsize=_Min_buckets; 

for (; _Newsize & lt; _Buckets & amp; & _Newsize & lt; _Maxsize; ) 
_Newsize *=2;//double until big enough 
If (_Newsize & lt; _Buckets) 
_Xout_of_range (" invalid hash bucket count "); 
while (! (size ()/max_load_factor () & lt; _Newsize) 
& & _Newsize & lt; _Maxsize) 
_Newsize *=2;//double until the load factor okay 

_Init (_Newsize); 
_Reinsert (); 
} 

This is the source code, unordered_set constructor
_Buckets is you provide the parameters of the constructor,

CodePudding user response:

At least print number should be divided exactly by 2

CodePudding user response:

refer to the second floor chegxy response:

at least print number should can be divided exactly by 2

I don't know what the compiler you use? I use vs2015, print is 128

CodePudding user response:

Codeblock, is Mingw compiler