I want to convert my id type from int to cstring so it can take values like b001,b002 etc...

however i am having trouble as it only reads one character

i have to use file io

this is my code pls correct me where i am wrong

#include #include using namespace std;

int menu(); void display(int* studId, char* sec, double* grade, int numstud); void readFile(ifstream& infile, int* studid, char* sec, double* grade); int* resizeIntArr(int newelem, int* originalArray, int sizeoriginal, int& sizenew); double* resizeDoubleArr(double newelem, double* originalArray, int sizeoriginal, int& sizenew); char* resizeCharArr(char newelem, char* originalArray, int sizeoriginal, int& sizenew); void save(int* studId, char* sec, double* grade, int numstud); int search(int* studId, int starget, int numstud);

double* resizeDoubleArr(double newelem, double* originalArray, int sizeoriginal, int& sizenew) { sizenew = sizeoriginal + newelem; double* newarray = new double[sizenew]; for (int i = 0; i < sizeoriginal; i++) { newarray[i] = originalArray[i]; } newarray[sizeoriginal] = newelem;

return newarray; delete[]newarray; } int* resizeIntArr(int newelem, int* originalArray, int sizeoriginal, int& sizenew) { sizenew = sizeoriginal + newelem; int* newarray = new int[sizenew]; for (int i = 0; i < sizeoriginal; i++) { newarray[i] = originalArray[i]; } newarray[sizeoriginal] = newelem;

return newarray; delete[]newarray; } char* resizeCharArr(char newelem, char* originalArray, int sizeoriginal, int& sizenew) { sizenew = sizeoriginal + newelem; char* newarray = new char[sizenew]; for (int i = 0; i < sizeoriginal; i++) { newarray[i] = originalArray[i]; } newarray[sizeoriginal] = newelem;

return newarray; delete[]newarray; } int search(int* studId, int starget, int numstud) { for (int i = 0; i < numstud; i++) { if (studId[i] == starget) { return i; } } return -1; } void readFile(ifstream& infile, int* studid, char* sec, double* grade) {

int s = 0; while (!infile.eof())

{

infile >> studid[s]; infile >> sec[s]; infile >> grade[s];

s++;

} } void display(int* studId, char* sec, double* grade, int numstud) {

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

{

cout << "Student Id: " << studId[i] << "\t" << "Section: " << sec[i] << "\t" << "Grade: " << grade[i] << endl;

} } void save(int* studId, char* sec, double* grade, int numstud) {

ofstream outfile("data.txt");

outfile << numstud << endl;

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

{

outfile << studId[i] << " " << sec[i] << " " << grade[i] << endl;

}

outfile.close(); } int menu() {

int option;

cout << "1. Enter new student 2. View all students 3. Search for an Id 4. Save and Exit Enter option: ";

cin >> option;

return option; } int main() {

//open the file

//read from the file the number of students

//create the arrays (stud id, grades)

//read the student ids and grades

//close the file

int numstud;

ifstream infile("data.txt");

if (infile.fail())

{

cout << "Failed..." << endl;

exit(1);

}

infile >> numstud;

int* studId = new int[numstud]; char* sec = new char[numstud]; double* grade = new double[numstud];

readFile(infile, studId, sec, grade);

infile.close();

int option, newstud, index;

int newsize = numstud;

do {

option = menu();

switch (option)

{

case 1:

cout << "How many students: ";

cin >> newstud;

newsize = numstud + newstud;

studId = resizeIntArr(newstud, studId, numstud, newsize); sec = resizeCharArr(newstud, sec, numstud, newsize); grade = resizeDoubleArr(newstud, grade, numstud, newsize);

for (int i = numstud; i < newsize; i++)

{

cout << "Enter Id: ";

cin >> studId[i];

cout << "Enter Section: ";

cin >> sec[i];

cout << "Enter the grade: ";

cin >> grade[i];

}

numstud = newsize;

cout << endl; //complete the logic

break;

case 2:

display(studId, sec, grade, newsize); cout << endl; break;

case 3:

int target; cout << "Enter the Id number to search: "; cin >> target;

index = search(studId, target, newsize); if (index != -1) { cout << "Row: " << index + 1 << " " << "Id: " << studId[index] << " " << "Section: " << sec[index] << " " << "Grade: " << grade[index] << endl; } else { cout << "Id number not found" << endl; } cout << endl; break;

case 4:

save(studId, sec, grade, newsize);

break;

default:

cout << "invalid input" << endl;

}

} while (option != 4);

delete[]studId; delete[]sec; delete[]grade;

return 0; }