C++ STL中的multiset ::运算符=

多重集是类似于set的一种关联容器，不同之处在于多个元素可以具有相同的值。

multiset ::运算符=

该运算符用于通过替换现有内容将新内容分配给容器。
它还根据新内容修改大小。

句法 ：

multisetname1 = (multisetname2)
Parameters :
Another container of the same type.
Result :
Assign the contents of the container passed as 
parameter to the container written on left side of the operator.

设置::运算符=

该运算符用于通过替换现有内容将新内容分配给容器。
它还根据新内容修改大小。

句法 ：

setname1 = (setname2)
Parameters :
Another container of the same type.
Result :
Assign the contents of the container passed as 
parameter to the container written on left side of the operator.

例子：

Input  :  mymultiset1 = 1, 2, 3
          mymultiset2 = 3, 2, 1, 4
          mymultiset1 = mymultiset2;
Output :  mymultiset1 = 3, 2, 1, 4

Input  :  mymultiset1 = 2, 6, 1, 5
          mymultiset2 = 3, 2
          mymultiset1 = mymultiset2;
Output :  mymultiset1 = 3, 2

Input  :  myset1 = 1, 2, 3
          myset2 = 3, 2, 1, 4
          myset1 = myset2;
Output :  myset1 = 3, 2, 1, 4

Input  :  myset1 = 2, 6, 1, 5
          myset2 = 3, 2
          myset1 = myset2;
Output :  myset1 = 3, 2

错误和异常

1.如果容器属于不同类型，则会引发错误。
2.否则，它有一个基本的无异常抛出保证。

// INTEGER MULISET EXAMPLE
// CPP program to illustrate
// Implementation of = operator
#include 
#include 
using namespace std;
   
int main()
{
    multiset mymultiset1{ 1, 7, 4, 9, 0};
    multiset mymultiset2{ 3, 4 };
    mymultiset1 = mymultiset2;
    cout << "mymultiset1 = ";
    for (auto it = mymultiset1.begin();
              it != mymultiset1.end(); ++it)
        cout << ' ' << *it;
    return 0;
}

输出：

mymultilist1 = 3 4

// CHARACTER MULTISET EXAMPLE
// CPP program to illustrate
// Implementation of = operator
#include 
#include 
using namespace std;
   
int main()
{
    multiset mymultiset1{ 'a', 'b', 'c'};
    multiset mymultiset2{ 'x', 'y' };
    mymultiset1 = mymultiset2;
    cout << "mymultiset1 = ";
    for (auto it = mymultiset1.begin();
              it != mymultiset1.end(); ++it)
        cout << ' ' << *it;
    return 0;
}

输出：

mymultilist1 = x y

// STRING MULTISET EXAMPLE
// CPP program to illustrate
// Implementation of = operator
#include 
#include 
#include
using namespace std;
   
int main()
{
    multiset mymultiset1{ "This","is","a","computer science portal"};
    multiset mymultiset2{ "GeeksForGeeks" };
    mymultiset1 = mymultiset2;
    cout << "mymultiset1 = ";
    for (auto it = mymultiset1.begin();
              it != mymultiset1.end(); ++it)
        cout << ' ' << *it;
    return 0;
}

输出：

mymultilist1 = GeeksForGeeks

时间复杂度： O(n)

// CPP program to illustrate
// Implementation of = operator
#include 
#include 
#include
using namespace std;
   
int main()
{
    set myset1{ "This","is","a","computer science portal"};
    set myset2{ "GeeksForGeeks" };
    myset1 = myset2;
    cout << "myset1 = ";
    for (auto it = myset1.begin();
              it != myset1.end(); ++it)
        cout << ' ' << *it;
    return 0;
}

输出：

mylist1 = GeeksForGeeks

时间复杂度： O(n)

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