Monday, 2 April 2018

c++ - no operator '>>' matches these operands

my program wont compile because it did not found match for the operand.
It accesses the map in struct Student, I am not sure if this is the exact way to access map.




my program wont compile because it did not found match for the operand.
It accesses the map in struct Student, I am not sure if this is the exact way to access map.



#include 
#include 
#include 
#include 
#include 
#include 
#include 



using namespace std;

struct Student {
    string id;
    map scores;
};

istream& operator >>(istream &is, Sudent& g) {


    auto it = g.scores.begin();
    is >> g.id >> it->first >> it.second;
    return is;
}


On >> it->first I get this error:



Error: no operator ">>" matches these operands

    operand types are: std::basic_istream> >> const std::string
-

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