STL——容器（List）list 的赋值操作
list.assign(beg, end);
//将[beg, end)区间中的数据拷贝赋值给本身
1 #include <iostream> 2 #include <list> 3 4 using namespace std; 5 6 int main() 7 { 8 int num[] = { 111,222,333,444,555 }; 9 list<int> listInt_A(num, num + size(num)); 10 list<int> listInt_B; 11 12 cout << "遍历 listInt_A："; 13 for (list<int>::iterator it = listInt_A.begin(); it != listInt_A.end(); it++) 14 { 15 cout << *it << " "; 16 } 17 cout << endl; 18 19 listInt_B.assign(++listInt_A.begin(), --listInt_A.end()); 20 cout << "遍历 listInt_B："; 21 for (list<int>::iterator it = listInt_B.begin(); it != listInt_B.end(); it++) 22 { 23 cout << *it << " "; 24 } 25 cout << endl; 26 27 return 0; 28 }
打印结果：
end()是结束符，但没有打印出来555，是因为前开后闭，
list.assign(n, elem);
//将n个elem拷贝赋值给本身
1 #include <iostream> 2 #include <list> 3 4 using namespace std; 5 6 int main() 7 { 8 list<int> listInt_A(5, 888); 9 10 cout << "遍历 listInt_A："; 11 for (list<int>::iterator it = listInt_A.begin(); it != listInt_A.end(); it++) 12 { 13 cout << *it << " "; 14 } 15 cout << endl; 16 17 return 0; 18 }
打印结果：
list& operator=(const list& lst);
//重载等号操作符
1 #include <iostream> 2 #include <list> 3 4 using namespace std; 5 6 int main() 7 { 8 int num[] = { 111,222,333,444,555 }; 9 list<int> listInt_A(num, num + size(num)); 10 list<int> listInt_B; 11 12 cout << "遍历 listInt_A："; 13 for (list<int>::iterator it = listInt_A.begin(); it != listInt_A.end(); it++) 14 { 15 cout << *it << " "; 16 } 17 cout << endl; 18 19 listInt_B = listInt_A; 20 cout << "遍历 listInt_B："; 21 for (list<int>::iterator it = listInt_B.begin(); it != listInt_B.end(); it++) 22 { 23 cout << *it << " "; 24 } 25 cout << endl; 26 27 return 0; 28 }
打印结果：
list.swap(lst);
//将lst与本身的元素互换
1 #include <iostream> 2 #include <list> 3 4 using namespace std; 5 6 int main() 7 { 8 int num[] = { 111,222,333,444,555 }; 9 list<int> listInt_A(num, num + size(num)); 10 list<int> listInt_B(5, 888); 11 12 cout << "互换前 遍历 listInt_A："; 13 for (list<int>::iterator it = listInt_A.begin(); it != listInt_A.end(); it++) 14 { 15 cout << *it << " "; 16 } 17 cout << endl; 18 cout << "互换前 遍历 listInt_B："; 19 for (list<int>::iterator it = listInt_B.begin(); it != listInt_B.end(); it++) 20 { 21 cout << *it << " "; 22 } 23 cout << endl; 24 25 //互换 26 listInt_A.swap(listInt_B); 27 cout << "互换后 遍历 listInt_A："; 28 for (list<int>::iterator it = listInt_A.begin(); it != listInt_A.end(); it++) 29 { 30 cout << *it << " "; 31 } 32 cout << endl; 33 cout << "互换后 遍历 listInt_B："; 34 for (list<int>::iterator it = listInt_B.begin(); it != listInt_B.end(); it++) 35 { 36 cout << *it << " "; 37 } 38 cout << endl; 39 40 return 0; 41 }
打印结果：
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