commit 773fc0e3c807a5a90298a743097676156ae236b7
parent 002ff347b065dde8a3331f9f4502f9b28155ef6c
Author: Christos Margiolis <christos@margiolis.net>
Date: Tue, 17 Mar 2020 16:52:38 +0200
changed vectors to pointer arrays, added stdout
Diffstat:
1 file changed, 133 insertions(+), 39 deletions(-)
diff --git a/assignment-2.2-classes/assignment-2.2-classes.cpp b/assignment-2.2-classes/assignment-2.2-classes.cpp
@@ -1,76 +1,170 @@
#include <iostream>
+#include <iomanip>
+#include <algorithm>
#include <string>
-#include <vector>
+#include <string.h>
class Student
{
private:
- std::vector<char> AM;
+ char *AM;
std::string name;
unsigned int semester;
unsigned int psubj;
- std::vector<float> psubjGrades;
+ float *grades;
+ int size;
public:
- Student(const std::vector<char>& AM, const std::string& name)
- :AM(AM), name(name), semester(1), psubj(0) {}
+ Student(const char *AM, const std::string& name)
+ :AM(convert_AM(AM)), name(name), semester(1), psubj(0) {}
- Student(const std::vector<char>& AM, const std::string& name, unsigned int semester)
- :psubj(0) {}
+ Student(const char *AM, const std::string& name, unsigned int semester)
+ :AM(convert_AM(AM)), name(name), semester(semester), psubj(0) {}
- Student(const std::vector<char>& AM, const std::string& name, unsigned int semester,
- unsigned int psubj, const std::vector<float>& psubjGrades)
- :AM(AM), name(name), semester(semester), psubj(psubj), psubjGrades(psubjGrades) {}
+ Student(const char *AM, const std::string& name, unsigned int semester,
+ unsigned int psubj, const float *grades)
+ :AM(convert_AM(AM)), name(name), semester(semester), psubj(psubj), grades(convert_PSG(grades)) {}
Student(const Student& s)
- :AM(s.AM), name(s.name), semester(s.semester), psubj(s.psubj), psubjGrades(s.psubjGrades) {}
+ :AM(s.AM), name(s.name), semester(s.semester), psubj(s.psubj), grades(s.grades) {}
- ~Student() {}
-
- inline const std::vector<char>& get_AM() const {return AM;}
+ ~Student()
+ {
+ delete[] this->AM;
+ delete[] this->grades;
+ }
+
+ inline const char *get_AM() const {return AM;}
inline const std::string& get_name() const {return name;}
inline unsigned int get_semester() const {return semester;}
inline unsigned int get_psubj() const {return psubj;}
- inline const std::vector<float>& get_psubjGrades() const {return psubjGrades;}
+ inline float *get_grades() const {return grades;}
- inline void set_AM(const std::vector<char>& AM) {this->AM = AM;}
+ inline void set_AM(const char *AM) {this->AM = convert_AM(AM);}
inline void set_name(const std::string& name) {this->name = name;}
inline void set_semester(unsigned int semester) {this->semester = semester;}
inline void set_psubj(unsigned int psubj) {this->psubj = psubj;}
- inline void set_psubjGrades(const std::vector<float>& psubjGrades) {this->psubjGrades = psubjGrades;}
- inline void add_grade(float grade) {psubjGrades.push_back(grade);}
+ inline void set_grades(float *grades) {this->grades = convert_PSG(grades);}
+ inline void print_3first() {std::cout << AM << " " << name << " " << semester << std::endl;}
+
+ char *convert_AM(const char *AM)
+ {
+ int len = strlen(AM);
+ this->AM = new char[len];
+ for (int i = 0; i < len && len; i++)
+ this->AM[i] = AM[i];
+ return this->AM;
+ }
+
+ float *convert_PSG(const float *grades)
+ {
+ this->grades = new float[psubj];
+ for (int i = 0; i < psubj && psubj; i++)
+ this->grades[i] = grades[i];
+ return this->grades;
+ }
+
+ void add_grade(float grade)
+ {
+ float *tmp = new float[psubj+1];
+ std::copy(this->grades, this->grades+psubj, tmp);
+ tmp[psubj] = grade;
+ this->grades = tmp;
+ psubj++;
+ }
+
+ void detailed_print()
+ {
+ for (int i = 0; i < psubj; i++)
+ {
+ std::cout << "Subject " << i+1 << ": ";
+ std::cout << grades[i] << std::endl;
+ }
+ std::cout << "Average grade: " << std::setprecision(2) << calc_average() << std::endl;
+ }
- inline void print_3first()
+ float calc_average()
{
- for (std::size_t i = 0; i < AM.size(); i++)
- std::cout << AM[i];
- std::cout << " " << name << " " << semester << std::endl;
+ float sum = 0;
+ for (int i = 0; i < psubj; i++)
+ sum += grades[i];
+ float average = sum / psubj;
+ return average;
}
};
int main(int argc, char **argv)
{
- std::vector<char> AM = {'1','9','3','9','0','1','3','3'};
- std::vector<float> psubjGrades = {9.5f, 8.4f, 5.6f};
- Student *s1 = new Student(AM, "Christos Margiolis");
- AM = s1->get_AM();
- std::cout << s1->get_name() << " " << s1->get_semester() << " " << s1->get_psubj() << std::endl;
+ Student *s1 = new Student("19390133", "Christos Margiolis");
+ std::cout << "Constructor for s1 (AM, Name)" << std::endl << "----------------------------" << std::endl;
+ std::cout << "s1->get_AM(): " << s1->get_AM() << std::endl;
+ std::cout << "s1->get_name(): " << s1->get_name() << std::endl;
+ std::cout << "s1->get_semester(): " << s1->get_semester() << std::endl;
+ std::cout << "s1->get_psubj(): " << s1->get_psubj() << std::endl;
delete s1;
- Student *s2 = new Student(AM, "Christos Margiolis", 2);
- s2->set_AM(AM);
- s2->set_name("AAAA");
- s2->set_semester(2);
- s2->set_psubj(3);
- s2->set_psubjGrades(psubjGrades);
- std::cout << s2->get_name() << " " << s2->get_semester() << " " << s2->get_psubj() << std::endl;
+ std::cout << std::endl;
+
+ Student *s2 = new Student("19390133", "Christos Margiolis", 2);
+ std::cout << "Constructor for s2 (AM, Name, Semester)" << std::endl << "----------------------------" << std::endl;
+ std::cout << "s2->get_AM(): " << s2->get_AM() << std::endl;
+ std::cout << "s2->get_name(): " << s2->get_name() << std::endl;
+ std::cout << "s2->get_semester(): " << s2->get_semester() << std::endl;
+ std::cout << "s2->get_psubj(): " << s2->get_psubj() << std::endl;
+
+ std::cout << std::endl;
+
+ Student *copystud = new Student(*s2);
+ std::cout << "Copy Constructor using copystud object as a copy of s2" << std::endl << "----------------------------" << std::endl;
+ std::cout << "copystud->get_AM(): " << copystud->get_AM() << std::endl;
+ std::cout << "copystud->get_name(): " << copystud->get_name() << std::endl;
+ std::cout << "copystud->get_semester(): " << copystud->get_semester() << std::endl;
+ std::cout << "copystud->get_psubj(): " << copystud->get_psubj() << std::endl;
delete s2;
- Student *s3 = new Student(AM, "Christos Margiolis", 2, 3, psubjGrades);
- s3->add_grade(7.5f);
- s3->print_3first();
- std::vector<float>().swap(psubjGrades);
- std::vector<char>().swap(AM);
+ std::cout << std::endl;
+
+ float grd[4] = {9.4f, 8.4f, 5.5f, 6.3f};
+ Student *s3 = new Student("19390133", "Christos Margiolis", 2, 4, grd);
+ std::cout << "Constructor for s3 (AM, Name, Semester, Subjects Passed, Grades)" << std::endl << "----------------------------" << std::endl;
+ std::cout << "s3->get_AM(): " << s3->get_AM() << std::endl;
+ std::cout << "s3->get_name(): " << s3->get_name() << std::endl;
+ std::cout << "s3->get_semester(): " << s3->get_semester() << std::endl;
+ std::cout << "s3->get_psubj(): " << s3->get_psubj() << std::endl;
+ float *gr1 = s3->get_grades();
+ std::cout << "s3->get_grades(): "; // new line?
+ for (int i = 0; i < s3->get_psubj(); i++)
+ std::cout << gr1[i] << ", ";
+ std::cout << std::endl;
+
+ std::cout << std::endl;
+ std::cout << "Detailed print of s3's grades" << std::endl << "----------------------------" << std::endl;
+ s3->detailed_print();
+
+ s3->set_AM("01010101");
+ s3->set_name("AAAAAAA");
+ s3->set_semester(100);
+ s3->set_psubj(2); // πρώτα η set_psubj() και μετα η set_grades() !!!!!
+ float gg[2] = {0.1f, 2.2f};
+ s3->set_grades(gg);
+
+ std::cout << std::endl;
+
+ std::cout << "Setters example using s3" << std::endl << "----------------------------" << std::endl;
+ std::cout << "Input: s3->set_AM(\"01010101\")" << '\t';
+ std::cout << "Output: s3->get_AM(): " << s3->get_AM() << std::endl;
+ std::cout << "Input: s3->set_name(\"AAAAAAA\")" << '\t';
+ std::cout << "Output: s3->get_name(): " << s3->get_name() << std::endl;
+ std::cout << "Input: s3->set_semester(100):" << '\t';
+ std::cout << "Output: s3->get_semester(): " << s3->get_semester() << std::endl;
+ std::cout << "Input: s3->set_psubj(2):" << '\t';
+ std::cout << "Output: s3->get_psubj(): " << s3->get_psubj() << std::endl;
+ float *gr2 = s3->get_grades();
+ std::cout << "Input: {0.1f, 2.2f}" << '\t' << '\t';
+ std::cout << "Output: s3->get_grades(): "; // new line?
+ for (int i = 0; i < s3->get_psubj(); i++)
+ std::cout << gr2[i] << ", ";
+ std::cout << std::endl;
delete s3;
return 0;
