vector中erase的用法
erase的函数原型有两种形式:
iterator erase(iterator position);
iterator erase(iterator first, iterator last); // 返回指向下一个元素的迭代器
错误示范:
std::vector<int> vec; for (int i = 0; i < 10; ++i) { vec.push_back(i); } for (std::vector<int>::iterator it = vec.begin(); it != vec.end(); ++it) { if (1 == *it) { vec.erase(it); } }
正确的使用方式:
std::vector<int> vec; for (int i = 0; i < 10; ++i) { vec.push_back(i); } vec.push_back(1); vec.push_back(1); vec.push_back(1); vec.push_back(1); for (auto it = vec.begin(); it != vec.end();) { if (1 == *it) { it = vec.erase(it); } else { ++it; } }