Given a map pre-filled with student names as keys and grades as values, complete main() by reading in the name of a student, outputting their original grade, and then reading in and outputting their new grade.Example: If the input is:```Quincy Wraight73.1```the output is:```Quincy Wraight's original grade: 65.4Quincy Wraight's new grade: 73.1``` ```cpp#include #include #include using namespace std;int main () { string studentName; double studentGrade; map studentGrades; // Students' grades (pre-entered) studentGrades.emplace("Harry Rawlins", 84.3); studentGrades.emplace("Stephanie Kong", 91.0); studentGrades.emplace("Shailen Tennyson", 78.6); studentGrades.emplace("Quincy Wraight", 65.4); studentGrades.emplace("Janine Antinori", 98.2); // TODO: Read in new grade for a student, output initial // grade, replace with new grade in map, // output new grade return 0;}```This code snippet is a C++ program that manages student grades using the `map` container from the C++ Standard Library. The code declares a map called `studentGrades`, which stores pairs of student names (as `string`) and their corresponding grades (as `double`).Pre-entered student records:1. Harry Rawlins with a grade of 84.32. Stephanie Kong with a grade of 91.03. Shailen Tennyson with a grade of 78.64. Quincy Wraight with a grade of 65.45. Janine Antinori with a grade of 98.2The program, as noted in the comments, is set up to read in a new grade for a student, output the initial grade, replace it with the new grade in the map, and then output the updated grade. However, the functionality for these tasks is outlined as a TODO and is not yet implemented.

After completing the code, I have provided C++ CODE along with CODE SCREENSHOT and OUTPUT…

Given a map pre-filled with student names as keys and grades as values, complete main() by reading in the name of a student, outputting their original grade, and then reading in and outputting their new grade. Ex: If the input is: Quincy Wraight 73.1 the output is: Quincy Wraight's original grade: 65.4 Quincy Wraight's new grade: 73.1

Given a map pre-filled with student names as keys and grades as values, complete main() by reading in the name of a student, outputting their original grade, and then reading in and outputting their new grade. Ex: If the input is: Quincy Wraight 73.1 the output is: Quincy Wraight's original grade: 65.4 Quincy Wraight's new grade: 73.1

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Concept explainers

Topological Sort

Topological sort is a sorting technique that sets up a hierarchy in a process. In this technique, when a directed network has nodes connected by arrows, the root node is placed before the successor node.

Question

Given a map pre-filled with student names as keys and grades as values, complete main() by reading in the name of a student, outputting their original grade, and then reading in and outputting their new grade.

Example: If the input is:
```
Quincy Wraight
73.1
```
the output is:
```
Quincy Wraight's original grade: 65.4
Quincy Wraight's new grade: 73.1
```

```cpp
#include <map>
#include <string>
#include <iostream>

using namespace std;

int main () {
string studentName;
double studentGrade;

map<string, double> studentGrades;

// Students' grades (pre-entered)
studentGrades.emplace("Harry Rawlins", 84.3);
studentGrades.emplace("Stephanie Kong", 91.0);
studentGrades.emplace("Shailen Tennyson", 78.6);
studentGrades.emplace("Quincy Wraight", 65.4);
studentGrades.emplace("Janine Antinori", 98.2);

// TODO: Read in new grade for a student, output initial
// grade, replace with new grade in map,
// output new grade

return 0;
}
```

This code snippet is a C++ program that manages student grades using the `map` container from the C++ Standard Library. The code declares a map called `studentGrades`, which stores pairs of student names (as `string`) and their corresponding grades (as `double`).

Pre-entered student records:
1. Harry Rawlins with a grade of 84.3
2. Stephanie Kong with a grade of 91.0
3. Shailen Tennyson with a grade of 78.6
4. Quincy Wraight with a grade of 65.4
5. Janine Antinori with a grade of 98.2

The program, as noted in the comments, is set up to read in a new grade for a student, output the initial grade, replace it with the new grade in the map, and then output the updated grade. However, the functionality for these tasks is outlined as a TODO and is not yet implemented.

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