C++ Usage and Example of Deque operator=()

C++ Deque (Double-ended Queue)

C ++ The Deque operator =() function allocates new content to the container and replaces the current content of the same type. The size of the deque can be modified accordingly.

Syntax

deque& operator(deque& x);

Parameter

x：This is a deque container whose content will be copied to another deque object.

Return value

It returns* this.

Instance1

Let's look at a simple instance

Example

#include iostream>
#include<deque>
using namespace std;
int main()
{
　　deque<int> a={1,2,3,4,5};
　　deque<int> b;
　　b.operator=(a);
　　for(int i=0;i<b.size();i++)
　　{
　　　　　　cout << b[i];
　　　　　　cout << " \";
　　}
　　　return 0;
}

Output:

1　2　3　4　5

In this example, the operator =() assigns the content of the 'a' container to the 'b' container.

Instance2

Let's look at a simple example when two dequeues are of different types.

Example

#include iostream>
#include<deque>
using namespace std;
int main()
{
　　deque<int> a={10,20,30,40,50};
　　deque<char> b;
　　b.operator=(a);
　　for(int i=0;i<b.size();i++)
　　{
　　　　　　cout << b[i];
　　　　　　cout << " \";
　　}
　　
　　　return 0;
}

Output:

error: no matching function for call to 'std::deque<char>::operator=(std::deque<int>&)'

In this example, the types of 'a' and 'b' are different. Therefore, the operator =() function will throw an error.

C++ Deque (Double-ended Queue)