錯誤：模板參數1無效，同時宣佈的迭代器載體

Question

下面的代碼

ifstream read("input-1.txt"); 
int n,u;read >> n; 
vector<list<int>> adj_list (n+1); 
string delimiter = "->",vertex,list; 
size_t pos = 0;int count; 
string::size_type sz; 
for (int i=0;i<n;i++){ 
    read >> list; 
    count = 0; 
    while((pos = list.find(delimiter))!= string::npos){ 
     vertex = list.substr(0,pos); 
     if (count!=0){ 
      adj_list[i].push_back(stoi (vertex.substr(1,vertex.length()),&sz)); 
     } 
     list.erase(0,pos+delimiter.length()); 
     count++; 
    } 
} 
read >> vertex; 
u = stoi (vertex.substr(1,vertex.length()),&sz); 



vector<list<int>>::iterator it1 = adj_list.begin(); 
while(it1!=adj_list.end()){ 
    list<int> new_list = *it1; 
    list<int>::iterator it2 = new_list.begin(); 
    while(it2!=new_list.end()){ 
     cout << *it2 <<" "; 
     it2++; 
    } 
    cout << endl; 
    it1++; 
} 
cout << u << n << "u" << "n"; 

提供了以下錯誤

even.cpp:37:26: error: template argument 1 is invalid 
    vector<typename list<int>>::iterator it1 = adj_list.begin(); 
         ^
even.cpp:37:26: error: template argument 2 is invalid 
even.cpp:37:39: error: qualified-id in declaration before ‘it1’ 
    vector<typename list<int>>::iterator it1 = adj_list.begin(); 
            ^
even.cpp:38:8: error: ‘it1’ was not declared in this scope 
    while(it1!=adj_list.end()){ 
     ^
even.cpp:39:8: error: expected primary-expression before ‘int’ 
    list<int> new_list = *it1; 
     ^
even.cpp:40:8: error: expected primary-expression before ‘int’ 
    list<int>::iterator it2 = new_list.begin(); 
     ^
even.cpp:41:9: error: ‘it2’ was not declared in this scope 
    while(it2!=new_list.end()){ 
     ^
even.cpp:41:14: error: ‘new_list’ was not declared in this scope 
    while(it2!=new_list.end()){ 

矢量是否正確聲明爲int的名單中。但是當它的迭代器被聲明時，它會給出有關模板參數的錯誤。 我只是使用int的而不是任何用戶定義的類，那麼也有我無法理解的錯誤。任何人都可以解決這個問題

Answer 1

變量list在

string delimiter = "->",vertex,list; 

宣佈被遮蔽std::list，要使用。爲變量使用另一個名稱。