Answered: I am having trouble having this code…

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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Question

I am having trouble having this code run correctly. I need some assistance as I am now lost.

main.cpp

#include "ScoreStatistics.cpp"
#include <iostream>
int main() {
int ch=1;
string names[100];
float scores[100];
int numberStudents=0;
while(ch!=4){
cout<<"1. Enter the test scores via a user prompt\n";
cout<<"2. Display grade roster\n";
cout<<"3. Display statistics\n";
cout<<"4. Exit\n";
cout<<"Your choice: ";
cin>>ch;
if(ch==1){
numberStudents=enterTestScoresViaUserPrompt(names,scores);
}else if(ch==2){
displayGradeRoster(scores,names,numberStudents);
}else if(ch==3){
displayClassStatistics(scores,numberStudents);
}else if(ch==4){

}else{
cout<<"Wrong menu item.\n\n";
}
}
return 0;
}

ScoreStatistics.cpp

#include "functions.hpp"
#include <iostream>

char getGrade(float score){
if(score>=90 && score<=100){
return 'A';
}
if(score>=80 && score<=89){
return 'B';
}
if(score>=70 && score<=79){
return 'C';
}
if(score>=60 && score<=69){
return 'D';
}
return 'F';
}
float computeMaxScore(float scores[],int numberStudents){
float maximumTestScore=scores[0];
for(int i=0;i<numberStudents;i++){
if(maximumTestScore<scores[i])
maximumTestScore=scores[i];
}
return maximumTestScore;

float computeMinScore(float scores[],int numberStudents){
float minimumTestScore=scores[0];
for(int i=0;i<numberStudents;i++){
if(minimumTestScore>scores[i]){
minimumTestScore=scores[i];
}
}
return minimumTestScore;
}
float computeAvgScore(float scores[],int numberStudents){
float totalScore=0;
for(int i=0;i<numberStudents;i++){
totalScore+=scores[i];
}
float classAverageScore=totalScore/(float)numberStudents;
return classAverageScore;
}

int enterTestScoresViaUserPrompt(string names[],float scores[]){
int numberStudents=-1;
while(numberStudents<=0){
cout<<"Enter the number of students: ";
cin>>numberStudents;
if(numberStudents<=0){
cout<<"\nInvalid value, please enter a correct value\n\n";
}
}
for(int i=0;i<numberStudents;i++){
cout<<"Enter the name of the student "<<(i+1)<<": ";
cin>>names[i];
scores[i]=-1;
while(scores[i]<0){
cout<<"Enter the score of the student "<<(i+1)<<": ";
cin>>scores[i];
if(scores[i]<=0){
cout<<"\nInvalid value, please enter a correct value\n\n";
}
}
}
return numberStudents;
}

void displayGradeRoster(float scores[],string names[],int numberStudents){
cout<<"\n";
cout<<fixed<<left<<setw(15)<<"Name"<<setw(15)<<"Test Score"<<"Grade\n";
cout<<left<<setw(15)<<"===="<<setw(15)<<"=========="<<"=====\n";
for(int i=0;i<numberStudents;i++){
cout<<left<<setw(15)<<names[i]<<setprecision(0)<<setw(15)<<scores[i]<<getGrade(scores[i])<<"\n";
}
cout<<"\n";
}

void displayClassStatistics(float scores[],int numberStudents){
cout<<"\n";
for(int i=0;i<15;i++){
cout<<"=";
}
cout<<"Class Statistics";
for(int i=0;i<15;i++){
cout<<"=";
}
float maximumTestScore=computeMaxScore(scores, numberStudents);
float minimumTestScore=computeMinScore(scores, numberStudents);
float classAverageScore=computeAvgScore(scores, numberStudents);;

cout<<"\nNumber of students in the class: "<<numberStudents<<"\n";
cout<<"Class Average score: "<<setprecision(4)<<classAverageScore<<"\n";
cout<<"Maximum Test score: "<<setprecision(0)<<maximumTestScore<<"\n";
cout<<"Minimum Test score: "<<minimumTestScore<<"\n\n";
}

function.hpp

#include <iostream>
#include <string>
#include <iomanip>
#include <fstream>
using namespace std;

char getGrade(float score);
float computeMaxScore(float scores[],int numberStudents);
float computeMinScore(float scores[],int numberStudents);
float computeAvgScore(float scores[],int numberStudents);
int enterTestScoresViaUserPrompt(string names[],float scores[]);
void displayGradeRoster(float scores[],string names[],int numberStudents);
void displayClassStatistics(float scores[],int numberStudents);

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