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#include <iostream>
#include <cstring>
using namespace std;
class Student {
char name[20] {};
int stno {};
int ssn {};
double gpa {};
public:
Course(const Course&) = delete; // NOT YET IMPLEMENTED
Course& operator=(const Course&) = delete; // NOT YET IMPLEMENTED
Student() {}
Student(const char* nam, int stn, int s, double g) : stno(stn), ssn(s), gpa(g) {
strcpy(name, nam);
}
void setName(const char* n) { strcpy(name, n); }
const char* getName() const { return name; }
void setStno(int i) { stno = i; }
int getStno() const { return stno; }
void setSsn(int s) { ssn = s; }
int getSsn() const { return ssn; }
void setGPA(double g) { gpa = g; }
double getGPA() const { return gpa; }
bool IsEqual(const Student& student1) {
return (student1.gpa == gpa) && strcmp(student1.name, name) == 0;
}
};
class Course {
char cname[20] {};
int cno {};
int CH {};
Student *s {};
int n {};
public:
~Course() { delete[] s; }
Course(const char* cnam, int cn, int CH1, int n1) : cno(cn), CH(CH1), n(n1) , s(new Student[n1]) {
strcpy(cname, cnam);
char sname[20] {};
int stno {};
int ssn {};
double gpa {};
for (int i = 0; i < n; ++i) {
cout << "Enter values for student #" << i + 1 << " Please enter name (no space/tab) stno ssn gpa: ";
cin >> sname >> stno >> ssn >> gpa;
s[i].setName(sname);
s[i].setStno(stno);
s[i].setSsn(ssn);
s[i].setGPA(gpa);
}
}
void setName(const char* na) { strcpy(cname, na); }
const char* getName() const {return cname; }
void setCno(int c) { cno = c; }
int getCno() const { return cno; }
void setCH(int d) { CH = d; }
int getCH() const { return CH; }
/*
// NO. s is a pointer to array, not single element
const Student* getStudent() const { return s; }
void setStudent(const char sname[], int sno, int ssn, double gpa) {
delete s;
s = new Student(sname, sno, ssn, gpa);
}
*/
// CALLER HAS TO DELETE RETURNED ALLOCATED MEMORY
Student* getStudentByName(const char* n1) {
int c {};
for (int i = 0; i < n; ++i)
if (strcmp(s[i].getName(), n1) == 0)
++c;
auto temp {new Student[c + 1]};
int j {};
for (int i = 0; i < n; ++i)
if (strcmp(s[i].getName(), n1) == 0)
temp[j++] = s[i];
temp[j] = *new Student("noname", 0, 0, -1);
return temp;
}
// CALLER HAS TO DELETE RETURNED ALLOCATED MEMORY
Student* getStudentByGPA(double g) {
int c {};
for (int i = 0; i < n; ++i)
if (s[i].getGPA() >= g)
c++;
auto temp {new Student[c + 1]};
int j {};
for (int i = 0; i < n; ++i)
if (s[i].getGPA() >= g)
temp[j++] = s[i];
temp[j] = *new Student("noname", 0, 0, -1);
return temp;
}
};
void display(const Student* st)
{
for (; strcmp(st->getName(), "noname") != 0; ++st)
cout << st->getName() << ' ' << st->getStno() << ' ' << st->getSsn() << ' ' << st->getGPA() << ' ' << '\n';
}
int main()
{
Course c1 {Course("CSE", 1, 3, 3)};
auto bynam {c1.getStudentByName("ahmad")};
auto bygpa {c1.getStudentByGPA(3.1)};
cout << "\nBy name\n";
display(bynam);
cout << "\nBy gpa\n";
display(bygpa);
delete[] bynam;
delete[] bygpa;
}
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