Please help me fix this error I get from the following code:

CourseGradebook.h

#ifndef COURSEGRADEBOOK_H #define COURSEGRADEBOOK_H

#include #include "Gradebook.h"

class CourseGradebook : public Gradebook { protected: std::unordered_map> gradebookData;

public: virtual ~CourseGradebook() {}

std::unordered_map GetAssignmentScores(std::string assignmentName) override { if (gradebookData.count(assignmentName) == 0) { return std::unordered_map(); } return gradebookData[assignmentName]; }

double GetScore(std::string assignmentName, int studentID) override { if (gradebookData.count(assignmentName) == 0 || gradebookData[assignmentName].count(studentID) == 0) { return NAN; } return gradebookData[assignmentName][studentID]; }

std::vector GetSortedAssignmentNames() override { std::vector assignmentNames; for (const auto& entry : gradebookData) { assignmentNames.push_back(entry.first); } std::sort(assignmentNames.begin(), assignmentNames.end()); return assignmentNames; }

std::vector GetSortedStudentIDs() override { std::unordered_map studentIDMap; for (const auto& entry : gradebookData) { for (const auto& subEntry : entry.second) { studentIDMap[subEntry.first] = true; } } std::vector studentIDs; for (const auto& entry : studentIDMap) { studentIDs.push_back(entry.first); } std::sort(studentIDs.begin(), studentIDs.end()); return studentIDs; }

std::unordered_map GetStudentScores(int studentID) override { std::unordered_map studentScores; for (const auto& entry : gradebookData) { if (entry.second.count(studentID) != 0){ studentScores[entry.first] = entry.second[studentID]; } } return studentScores; }

void SetScore(std::string assignmentName, int studentID, double score) override { gradebookData[assignmentName][studentID] = score; } };

#endif

Error

In file included from main.cpp:6: CourseGradebook.h: In member function virtual std::unordered_map, double> CourseGradebook::GetStudentScores(int): CourseGradebook.h:57:68: error: passing const std::unordered_map as this argument discards qualifiers [-fpermissive] 57 | studentScores[entry.first] = entry.second[studentID];