deque 的赋值分下边4种方法：
deque.assign(beg,end);
//将[beg, end)区间中的数据拷贝赋值给本身。注意该区间是左闭右开的区间。
1 #include <iostream>
2 #include <deque>
3
4 using namespace std;
5
6 int main()
7 {
8 deque<int> deqInt_A, deqInt_B;
9
10 deqInt_A.push_back(1);
11 deqInt_A.push_back(2);
12 deqInt_A.push_back(3);
13 deqInt_A.push_back(4);
14
15 deqInt_B.assign(deqInt_A.begin(), deqInt_A.end());
16
17 cout << "deqInt_B 中的元素为：" << endl;
18 for (deque<int>::iterator it = deqInt_B.begin(); it != deqInt_B.end(); it++)
19 {
20 cout << *it << " ";
21 }
22
23 return 0;
24 }
打印结果：
deque.assign(n,elem);
//将n个elem拷贝赋值给本身。
1 #include <iostream>
2 #include <deque>
3
4 using namespace std;
5
6 int main()
7 {
8 deque<int> deqInt_A;
9 deqInt_A.assign(4, 888);
10
11 cout << "deqInt_A 中的元素为：" << endl;
12 for (deque<int>::iterator it = deqInt_A.begin(); it != deqInt_A.end(); it++)
13 {
14 cout << *it << " ";
15 }
16
17 return 0;
18 }
打印结果：
deque& operator=(const deque &deq);
//重载等号操作符
1 #include <iostream>
2 #include <deque>
3
4 using namespace std;
5
6 int main()
7 {
8 deque<int> deqInt_A, deqint_B;
9 deqInt_A.assign(4, 888);
10 deqint_B = deqInt_A; // operator= 重载，可以直接进行赋值
11
12 cout << "deqint_B 中的元素为：" << endl;
13 for (deque<int>::iterator it = deqint_B.begin(); it != deqint_B.end(); it++)
14 {
15 cout << *it << " ";
16 }
17
18 return 0;
19 }
打印结果：
deque.swap(deq);
// 将deque与本身的元素互换
1 #include <iostream>
2 #include <deque>
3
4 using namespace std;
5
6 int main()
7 {
8 deque<int> deqInt_A, deqint_B;
9 deqInt_A.assign(4, 111);
10 deqint_B.assign(5, 222);
11
12 cout << "deqInt_A 中的元素为：" << endl;
13 for (deque<int>::iterator it = deqInt_A.begin(); it != deqInt_A.end(); it++)
14 {
15 cout << *it << " ";
16 }
17 cout << "\ndeqint_B 中的元素为：" << endl;
18 for (deque<int>::iterator it = deqint_B.begin(); it != deqint_B.end(); it++)
19 {
20 cout << *it << " ";
21 }
22 cout << "\n\nswap 进行翻转" << endl;
23 deqInt_A.swap(deqint_B);
24 cout << "deqInt_A 中的元素为：" << endl;
25 for (deque<int>::iterator it = deqInt_A.begin(); it != deqInt_A.end(); it++)
26 {
27 cout << *it << " ";
28 }
29 cout << "\ndeqint_B 中的元素为：" << endl;
30 for (deque<int>::iterator it = deqint_B.begin(); it != deqint_B.end(); it++)
31 {
32 cout << *it << " ";
33 }
34 return 0;
35 }
打印结果：
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