C++ code modification help required ?

Hi there

I am having lots of trouble with this program , I am really falling behind.
Hopefully you can help me .

This program opens a text file, then it reads first name, last name, and test score. then it assigns scores and displays students by name, score, test score range, and highest score.

SAMPLE TEXT FILE : SACHIN TENDULKAR 100 SUNIL GAVASKAR 95
these are first name last name test score order ..

My progress till now ..
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#include
#include
#include

using namespace std;

struct StudentType
{string studentName;
int testScore;//Between 0 and 100
char grade;

};

void PrintNameHeader(ostream& out);
bool OpenInputFile(ifstream& inFile, string& infilename ); //OPEN input file
void Pause();// Pause
void ReadStudentData(ifstream& infile, StudentType student[], int& );// Read student infp including first and last name and test score
void AssignGrades(StudentType student[], int);//assign grades to each student
int HighestScore(const StudentType student[], int );//Get the highest scores
void PrintNamesWithHighestScore(const StudentType student[], int);//Print name/s with highest Scores
void DisplayAllStudents(const StudentType student[], int);//Display all students
void GetLowHighRangeValues(int& , int&);//for example a student types 50 100 , it will get all students within that range
void DisplayStudentsInRange(const StudentType student[], int, int, int);// display students in that range
void SortStudentsByName(StudentType student[], int);// sort students by name
void SortStudentsByScore(StudentType student[], int);// sort students by test score highest to lowest

const int NUM_STUDENTS = 20;

int main()
{

ifstream infile;
string inFilename;

StudentType student[NUM_STUDENTS];

int numStudents = 0;

PrintNameHeader(cout);

OpenInputFile(infile,inFilename);

ReadStudentData(infile, student, numStudents);

return 0;
}

//Function definitions

void PrintNameHeader(ostream& out)//Completed
{
cout <<"My name << endl;

}
bool OpenInputFile(ifstream& inFile, string& infilename) //COMPLETED
{

cout << "Enter the name of the .txt file that you want to open for input.\n";
cout << "Do not put spaces in the file name ";
cin >> infilename;
cout << endl;

inFile.open(infilename.c_str());
if (inFile.fail())
{
cout << "Sorry, the input file " << infilename <<" was not found"<< endl;\
return false;
}

cout << "Input file " << infilename << " is open for reading.\n\n";
return true;
}

void Pause()
{
cout << endl;

cin.ignore(80, '\n');

cout<<"Please hit the enter key to continue...\n";

cin.get();

}

void ReadStudentData(ifstream& infile, StudentType student[], int& numstudents)
{
string firstName,
LastName,
testScore;

int count = 0;

StudentType fullname;

if( infile)

for (int count; count < NUM_STUDENTS; count++)
{
cin >> firstName[count] >> LastName[count] >> testScore[count];

fullname[count]= firstName + ", " + LastName;

}

numstudents = count;
cout << numstudents << endl;

}
void AssignGrades(StudentType student[], int numstudents)
{

int testscore;

char grade;

for( int i = 0; i < NUM_STUDENTS; i++)
{
if(testscore >= 90 && testscore <=100)

grade = 'A';

else if(testscore >= 80 && testscore <90)

grade = 'B';

else if(testscore >= 70 && testscore <80)

grade = 'C';

else if(testscore >= 60 && testscore <70)

grade = 'D';

else

grade = 'F';
}

}
int HighestScore(const StudentType student[], int numstudents)
{
int Students = 6;////dummy

return Students;
}
void PrintNamesWithHighestScore(const StudentType student[], int numstudents)
{

}
void DisplayAllStudents(const StudentType student[], int numstudents)
{

}
void GetLowHighRangeValues(int& lowRange, int& highRange)
{

}

void DisplayStudentsInRange(const StudentType student[], int numStudents, int lownum, int highNum)
{

}

void SortStudentsByName(StudentType student[], int numStudents)
{

}

void SortStudentsByScore(StudentType student[], int numstudents)
{

}

Cheers & ty
Kiran

Try this:

#include

using namespace std;

struct StudentType

{

string studentName;

int testScore;//Between 0 and 100

char grade;

};

void PrintNameHeader(ostream& out);

bool OpenInputFile(ifstream& inFile, string& infilename ); //OPEN input file

void Pause();// Pause

void ReadStudentData(ifstream& infile, StudentType student[], int& );// Read student infp including first and last name and test score

void AssignGrades(StudentType student[], int);//assign grades to each student

int HighestScore(const StudentType student[], int );//Get the highest scores

void PrintNamesWithHighestScore(const StudentType student[], int);//Print name/s with highest Scores

void DisplayAllStudents(const StudentType student[], int);//Display all students

void GetLowHighRangeValues(const StudentType student[], int, int& , int&);//for example a student types 50 100 , it will get all students within that range

void DisplayStudentsInRange(const StudentType student[], int, int, int);// display students in that range

void SortStudentsByName(StudentType student[], int);// sort students by name

void SortStudentsByScore(StudentType student[], int);// sort students by test score highest to lowest

const int NUM_STUDENTS = 20;

int main()

{

ifstream infile;

string inFilename;

StudentType student[NUM_STUDENTS];

int numStudents = 0;

PrintNameHeader(cout);

if(!OpenInputFile(infile,inFilename)) return 1;

ReadStudentData(infile, student, numStudents);

infile.close();

AssignGrades(student, numStudents);

cout << endl << "Highest score is " << HighestScore(student, numStudents) << endl;

PrintNamesWithHighestScore(student, numStudents);

DisplayAllStudents(student, numStudents);

int lownum, highnum;

GetLowHighRangeValues(student, numStudents, lownum, highnum);

cout << "The scores are in the range " << lownum << " to " << highnum << endl;

DisplayStudentsInRange(student, numStudents, 70, 90);

SortStudentsByName(student, numStudents);

SortStudentsByScore(student, numStudents);

Pause();

return 0;

}

//Function definitions

void PrintNameHeader(ostream& out)//Completed

{

cout <<"My name" << endl; //** added closing quote

}

bool OpenInputFile(ifstream& inFile, string& infilename) //COMPLETED

{

cout << "Enter the name of the .txt file that you want to open for input.\n";

cout << "Do not put spaces in the file name : ";

cin >> infilename;

cout << endl;

inFile.open(infilename.c_str());

if (inFile.fail())

{

cout << "Sorry, the input file " << infilename <<" was not found"<< endl;\

return false;

}

cout << "Input file " << infilename << " is open for reading.\n\n";

return true;

}

void Pause()

{

cout << endl;

cin.ignore(80, '\n');

cout<<"Please hit the enter key to continue...\n";

cin.get();

}

void ReadStudentData(ifstream& infile, StudentType student[], int& numStudents)

{

string firstName, lastName, testScore;

int count = 0;

while(!infile.eof())

{

infile >> firstName >> lastName >> testScore;

student[count].studentName = lastName + ", " + firstName;

student[count].testScore = atoi(testScore.c_str());

count++;

}

numStudents = count;

cout << "Number of student records read = " << numStudents << endl;

}

void AssignGrades(StudentType student[], int numStudents)

{

int testscore;

char grade;

for(int i = 0; i < numStudents; i++)

{

testscore = student[i].testScore;

if(testscore >= 90 && testscore <=100)

grade = 'A';

else if(testscore >= 80 && testscore <90)

grade = 'B';

else if(testscore >= 70 && testscore <80)

grade = 'C';

else if(testscore >= 60 && testscore <70)

grade = 'D';

else

grade = 'F';

student[i].grade = grade;

}

int HighestScore(const StudentType student[], int numStudents)

{

int highest = student[0].testScore;

for(int i = 1; i < numStudents; i++)

{

if(highest < student[i].testScore) highest = student[i].testScore;

}

return highest;

}

void PrintNamesWithHighestScore(const StudentType student[], int numStudents)

{

int highest = HighestScore(student, numStudents);

cout << endl << "The following student(s) have the highest score" << endl << endl;

for(int i = 0; i < numStudents; i++)

{

if (student[i].testScore == highest)

{

cout << " " << student[i].studentName;

}

cout << endl;

}

void DisplayAllStudents(const StudentType student[], int numStudents)

{

cout << endl << "List of all students" << endl << endl;

for(int i = 0; i < numStudents; i++)

{

cout << " " << student[i].studentName << " " << student[i].testScore << " " << student[i].grade << endl;

}

cout << endl;

}

void GetLowHighRangeValues(const StudentType student[], int numStudents, int& lowRange, int& highRange)

{

int lowest = student[0].testScore;

for(int i = 1; i < numStudents; i++)

{

if(lowest > student[i].testScore) lowest = student[i].testScore;

}

lowRange = lowest;

highRange = HighestScore(student, numStudents);

}

void DisplayStudentsInRange(const StudentType student[], int numStudents, int lownum, int highnum)

{

cout << endl << "List of students with scores in the range " << lownum << " to " << highnum << endl << endl;

for(int i = 0; i < numStudents; i++)

{

if(student[i].testScore >= lownum && student[i].testScore <= highnum)

{

cout << " " << student[i].studentName << " " << student[i].testScore << " " << student[i].grade << endl;

}

cout << endl;

}

void SortStudentsByName(StudentType student[], int numStudents)

{

StudentType temp;

for(int i = 0;i < numStudents - 1;i++)

{

for(int j = i + 1; j < numStudents;j++)

{

if(student[i].studentName > student[j].studentName)

{

temp = student[i];

student[i] = student[j];

student[j] = temp;

}

cout << "After sorting by name";

DisplayAllStudents(student, numStudents);

}

void SortStudentsByScore(StudentType student[], int numStudents)

{

StudentType temp;

for(int i = 0;i < numStudents - 1;i++)

{

for(int j = i + 1; j < numStudents;j++)

{

if(student[i].testScore > student[j].testScore)

{

temp = student[i];

student[i] = student[j];

student[j] = temp;

}

cout << "After sorting by score";

DisplayAllStudents(student, numStudents);

}

1 Reply

Know the answer? Post it — somebody with the same question will find it here.

Vulpes13y ago
Accepted answer
Try this:

#include
#include
#include

using namespace std;

struct StudentType
{
string studentName;
int testScore;//Between 0 and 100
char grade;
};

void PrintNameHeader(ostream& out);
bool OpenInputFile(ifstream& inFile, string& infilename ); //OPEN input file
void Pause();// Pause
void ReadStudentData(ifstream& infile, StudentType student[], int& );// Read student infp including first and last name and test score
void AssignGrades(StudentType student[], int);//assign grades to each student
int HighestScore(const StudentType student[], int );//Get the highest scores
void PrintNamesWithHighestScore(const StudentType student[], int);//Print name/s with highest Scores
void DisplayAllStudents(const StudentType student[], int);//Display all students
void GetLowHighRangeValues(const StudentType student[], int, int& , int&);//for example a student types 50 100 , it will get all students within that range
void DisplayStudentsInRange(const StudentType student[], int, int, int);// display students in that range
void SortStudentsByName(StudentType student[], int);// sort students by name
void SortStudentsByScore(StudentType student[], int);// sort students by test score highest to lowest

const int NUM_STUDENTS = 20;

int main()
{
ifstream infile;
string inFilename;
StudentType student[NUM_STUDENTS];
int numStudents = 0;

PrintNameHeader(cout);
if(!OpenInputFile(infile,inFilename)) return 1;
ReadStudentData(infile, student, numStudents);
infile.close();
AssignGrades(student, numStudents);
cout << endl << "Highest score is " << HighestScore(student, numStudents) << endl;
PrintNamesWithHighestScore(student, numStudents);
DisplayAllStudents(student, numStudents);
int lownum, highnum;
GetLowHighRangeValues(student, numStudents, lownum, highnum);
cout << "The scores are in the range " << lownum << " to " << highnum << endl;
DisplayStudentsInRange(student, numStudents, 70, 90);
SortStudentsByName(student, numStudents);
SortStudentsByScore(student, numStudents);
Pause();
return 0;
}

//Function definitions

void PrintNameHeader(ostream& out)//Completed
{
cout <<"My name" << endl; //** added closing quote
}

bool OpenInputFile(ifstream& inFile, string& infilename) //COMPLETED
{
cout << "Enter the name of the .txt file that you want to open for input.\n";
cout << "Do not put spaces in the file name : ";
cin >> infilename;
cout << endl;

inFile.open(infilename.c_str());
if (inFile.fail())
{
cout << "Sorry, the input file " << infilename <<" was not found"<< endl;\
return false;
}

cout << "Input file " << infilename << " is open for reading.\n\n";
return true;
}

void Pause()
{
cout << endl;
cin.ignore(80, '\n');
cout<<"Please hit the enter key to continue...\n";
cin.get();
}

void ReadStudentData(ifstream& infile, StudentType student[], int& numStudents)
{
string firstName, lastName, testScore;
int count = 0;

while(!infile.eof())
{
infile >> firstName >> lastName >> testScore;
student[count].studentName = lastName + ", " + firstName;
student[count].testScore = atoi(testScore.c_str());
count++;
}

numStudents = count;
cout << "Number of student records read = " << numStudents << endl;
}

void AssignGrades(StudentType student[], int numStudents)
{

int testscore;
char grade;

for(int i = 0; i < numStudents; i++)
{
testscore = student[i].testScore;

if(testscore >= 90 && testscore <=100)
grade = 'A';
else if(testscore >= 80 && testscore <90)
grade = 'B';
else if(testscore >= 70 && testscore <80)
grade = 'C';
else if(testscore >= 60 && testscore <70)
grade = 'D';
else
grade = 'F';

student[i].grade = grade;
}
}

int HighestScore(const StudentType student[], int numStudents)
{
int highest = student[0].testScore;

for(int i = 1; i < numStudents; i++)
{
if(highest < student[i].testScore) highest = student[i].testScore;
}

return highest;
}

void PrintNamesWithHighestScore(const StudentType student[], int numStudents)
{
int highest = HighestScore(student, numStudents);

cout << endl << "The following student(s) have the highest score" << endl << endl;

for(int i = 0; i < numStudents; i++)
{
if (student[i].testScore == highest)
{
cout << " " << student[i].studentName;
}
}

cout << endl;
}

void DisplayAllStudents(const StudentType student[], int numStudents)
{
cout << endl << "List of all students" << endl << endl;

for(int i = 0; i < numStudents; i++)
{
cout << " " << student[i].studentName << " " << student[i].testScore << " " << student[i].grade << endl;
}

cout << endl;
}

void GetLowHighRangeValues(const StudentType student[], int numStudents, int& lowRange, int& highRange)
{
int lowest = student[0].testScore;

for(int i = 1; i < numStudents; i++)
{
if(lowest > student[i].testScore) lowest = student[i].testScore;
}

lowRange = lowest;
highRange = HighestScore(student, numStudents);
}

void DisplayStudentsInRange(const StudentType student[], int numStudents, int lownum, int highnum)
{
cout << endl << "List of students with scores in the range " << lownum << " to " << highnum << endl << endl;
for(int i = 0; i < numStudents; i++)
{
if(student[i].testScore >= lownum && student[i].testScore <= highnum)
{
cout << " " << student[i].studentName << " " << student[i].testScore << " " << student[i].grade << endl;
}
}

cout << endl;
}

void SortStudentsByName(StudentType student[], int numStudents)
{
StudentType temp;

for(int i = 0;i < numStudents - 1;i++)
{
for(int j = i + 1; j < numStudents;j++)
{
if(student[i].studentName > student[j].studentName)
{
temp = student[i];
student[i] = student[j];
student[j] = temp;
}
}
}

cout << "After sorting by name";
DisplayAllStudents(student, numStudents);
}

void SortStudentsByScore(StudentType student[], int numStudents)
{
StudentType temp;

for(int i = 0;i < numStudents - 1;i++)
{
for(int j = i + 1; j < numStudents;j++)
{
if(student[i].testScore > student[j].testScore)
{
temp = student[i];
student[i] = student[j];
student[j] = temp;
}
}
}

cout << "After sorting by score";
DisplayAllStudents(student, numStudents);
}