unordered_multiset :: max_load_factor()是C++ STL中的内置函数,该函数返回unordered_multiset容器的最大加载因子。此函数还提供设置最大负载系数的选项。
语法(返回最大负载系数):
unordered_multiset_name.max_load_factor()
参数:该函数不接受任何参数。
返回值:它返回一个整数值,该整数值表示容器的最大装载系数。
下面的程序说明了unordered_multiset :: max_load_factor()函数:
程序1 :
// C++ program to illustrate
// unordered_multiset::max_load_factor()
#include
#include
using namespace std;
int main()
{
// declaration
unordered_multiset s1;
s1 = { 'a', 'b', 'c', 'd' };
// displaying initial parameters
cout << "Current parameters are :\n";
cout << "max_load_factor= " << s1.max_load_factor() << endl;
cout << "load_factor= " << s1.load_factor() << endl;
cout << "size of s1= " << s1.size() << endl;
cout << "bucket_count= " << s1.bucket_count() << endl;
return 0;
}
输出:
Current parameters are :
max_load_factor= 1
load_factor= 0.571429
size of s1= 4
bucket_count= 7
程序2 :
// c++ program to illustrate
// unordered_multiset::max_load_factor()
#include
#include
using namespace std;
int main()
{
// declaration
unordered_multiset s1;
s1 = { 'a', 'b', 'c', 'd' };
// displaying initial parameters
cout << "Current parameters are :\n";
cout << "max_load_factor= " << s1.max_load_factor() << endl;
cout << "load_factor= " << s1.load_factor() << endl;
cout << "size of s1= " << s1.size() << endl;
cout << "bucket_count= " << s1.bucket_count() << endl;
// changing max_load_factor
s1.max_load_factor(0.5);
cout << endl;
// displaying final parameters
cout << "Final parameters are :\n";
cout << "max_load_factor= " << s1.max_load_factor() << endl;
cout << "load_factor= " << s1.load_factor() << endl;
cout << "size of s1= " << s1.size() << endl;
cout << "bucket_count= " << s1.bucket_count() << endl;
return 0;
}
输出:
Current parameters are :
max_load_factor= 1
load_factor= 0.571429
size of s1= 4
bucket_count= 7
Final parameters are :
max_load_factor= 0.5
load_factor= 0.235294
size of s1= 4
bucket_count= 17
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