[英]flann/util/serialization.h class std::unordered_map<unsigned int, std::vector<unsigned int> >' has no member named 'serialize'
[英]g++: 'class std::map<int, std::vector<std::vector<int> > >' has no member named 'insert_or_assign'
為 leetcode 上的一個問題編碼。 我正在使用std::map
將 int 鏈接到vector<vector<int>>
。 我在cppreference上檢查了 API 並使用 function std::map::insert_or_assign()
插入鍵值對。 However upon compiling the code with g++ on windows 10 powershell terminal (editor-VSCode), I get the following output in the terminal.
PS C:\Users\vishw\Desktop\vsCode\p15_leetcode> g++ p15.cpp -o p15.exe
p15.cpp: In member function 'bool Solution::present(std::vector<std::vector<int> >&, std::vector<int>&)':
p15.cpp:75:19: error: 'class std::map<int, std::vector<std::vector<int> > >' has no member named 'insert_or_assign'
store.insert_or_assign(arg_nums[0], v);
為什么我會收到此錯誤? C++版本問題? 編譯器問題? 請幫忙! 我的代碼下方的 PFA
class Solution {
private:
map<int, vector<vector<int>>> store;
public:
vector<vector<int>> threeSum(vector<int>& arg_nums) {
vector<vector<int>> vector_return;
if (arg_nums.size() < 3) return vector_return;
vector<int> holder;
for (int index0 = 0; index0 < arg_nums.size() - 2; ++index0) {
for (int index1 = index0 + 1; index1 < arg_nums.size() - 1; ++index1) {
if (index1 != index0) {
for (int index2 = index1 + 1; index2 < arg_nums.size() - 0; ++index2) {
if ((index2 != index1)
&& (index2 != index0)) {
if (arg_nums[index2] + arg_nums[index1] + arg_nums[index0] == 0) {
holder = sort(arg_nums[index0], arg_nums[index1],
arg_nums[index2]);
if (!present(vector_return, holder)) {
vector_return.push_back(holder);
}
}
}
}
}
}
}
return vector_return;
}
vector<int> sort(int arg_num0, int arg_num1, int arg_num2) {
vector<int> vector_return;
if (arg_num0 > arg_num1) {
vector_return.push_back(arg_num0);
vector_return.insert(vector_return.begin(), arg_num1);
if (arg_num2 > arg_num0) vector_return.push_back(arg_num2);
else {
if ((arg_num2 > arg_num1) && (arg_num2 <= arg_num0)) {
vector_return.insert(++vector_return.begin(), arg_num2);
} else vector_return.insert(vector_return.begin(), arg_num2);
}
} else {
vector_return.push_back(arg_num1);
vector_return.insert(vector_return.begin(), arg_num0);
if (arg_num2 > arg_num1) vector_return.push_back(arg_num2);
else {
if ((arg_num2 > arg_num0) && (arg_num2 <= arg_num1)) {
vector_return.insert(++vector_return.begin(), arg_num2);
} else vector_return.insert(vector_return.begin(), arg_num2);
}
}
return vector_return;
}
bool present(vector<vector<int>>& arg_gathered, vector<int>& arg_nums) {
if (store.find(arg_nums[0]) == store.end()) {
vector<vector<int>> v;
v.push_back(arg_nums);
store.insert_or_assign(arg_nums[0], v);
return true;
} else {
map<int, vector<vector<int>>>::iterator iterator0 = store.find(arg_nums[0]);
vector<vector<int>>::iterator iterator1 = (std::get<vector<vector<int>>>(*iterator0)).begin();
while (iterator1 != std::get<vector<vector<int>>>(*iterator0).end()) {
if (*iterator1 == arg_nums) return false;
iterator1 = iterator1 + 1;
}
(std::get<vector<vector<int>>>(*iterator0)).push_back(arg_nums);
return true;
}
}
};
這是一個簡單的版本問題,感謝acraig5075的幫助(問題下方評論),代碼編譯成功。 這是在編譯時如何指定 c++ 版本的方法
g++ -std=c++17 your_program_name.cpp -o you_give_name.exe
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