Stack with linked list

#include <iostream>
#include <vector>

using namespace std;

template <typename type_key,typename type_body>
struct Row{
    type_key key;
    type_body body;
    Row(type_key key, type_body body) : key(key), body(body) {}
};
template <typename type_key,typename type_body>
class Table{
private:
    vector<Row<type_key,type_body>> table;
public:
    void add(type_key key,type_body body){
        table.push_back(Row(key,body));
    }
    bool find(type_key key){
        bool find=false;
        for(int i=0;i<table.size();i++){
            if(table.at(i).key==key){
                return true;
            }
        }
    }
    int find_return_num(type_key key){
        for(int i=0;i<table.size();i++){
            if(table.at(i).key==key){
                return i;
            }
        }
    }
    void delete_element(type_key key){
        table.erase(find_return_num(key));
        int k;
    }

};


int main(){

    Table<int,int> table;
    table.add(4,7);
    table.add(11,8);
    table.delete_element(11);
    cout<<table.find(4);

    return 0 ;
};