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September 19, 2022 17:22
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Working with pointers in C++
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#include <iostream> | |
#include <string> | |
#include <stdio.h> | |
using namespace std; | |
int main() { | |
//************************************************************* | |
class Student { //********************************************* | |
public: | |
string student_ID, first_name; | |
// setters | |
void set_student_ID(string student_ID){ this->student_ID = student_ID; } | |
void set_first_name(string first_name){ this->first_name = first_name;} | |
// getters | |
string get_student_ID() { this->student_ID = student_ID; }; | |
string get_first_name() { this->first_name = first_name; }; | |
void print(){ cout << this->get_student_ID(); }; | |
// constructor | |
Student(string student_ID, string first_name){ | |
this-> student_ID = student_ID; | |
this-> first_name = first_name; | |
}; | |
}; //********************************************************** | |
//************************************************************* | |
//************************************************************* | |
class Roster { //********************************************** | |
public: | |
int delimCount = 0; | |
string str_student_data; | |
Student* classRosterArray[5]; | |
// "studentData[]" parser / then call add() | |
void parse(int i, string arrRow){ | |
string sendID, sendFName; | |
for (char c : arrRow){ | |
//cout << c;// print all chars | |
if (c == ','){ delimCount++; } | |
if (delimCount == 0){ | |
sendID = arrRow.substr(0,2); | |
} | |
if (delimCount == 1){ | |
sendFName = arrRow.substr(4,(arrRow.length() - 4)); | |
} | |
} cout << endl; // break by index | |
delimCount = 0; | |
add( i ,sendID, sendFName); | |
}; | |
// "classRosterArray[]" builder / new "Student" object builder | |
void add(int i, string student_ID, string first_name) { | |
//cout<< i << " " << student_ID << " " << first_name; | |
classRosterArray[i] = new Student (student_ID, first_name); | |
cout << classRosterArray[i]; | |
}; | |
// remove student from "classRosterArray[]" or "Student" | |
void remove() { | |
}; | |
// print current state of roster | |
void printAll(){ | |
for (int i = 0; i < 5; i++){ | |
//how can I dereference "classRosterArray[i]" to see instance of student object? | |
cout << "address is -> " << classRosterArray[i] << " student is -> " << endl; | |
} | |
} | |
// constructor | |
Roster(){}; | |
}; //********************************************************* | |
//************************************************************* | |
//array | |
const string studentData[] = { | |
"A1, John", | |
"A2, Suzan", | |
"A3, Jack", | |
"A4, Erin", | |
"A5, German" | |
}; | |
//console out array | |
for (int i = 0; i < 5; i++){ | |
cout << &studentData[i] << ": " << studentData[i] << endl; | |
} | |
//instantiate roster | |
Roster roster; | |
//parse array | |
for (int i = 0; i < 5; i++){ | |
roster.parse(i, studentData[i]); | |
} cout << endl << endl; | |
//print array | |
roster.printAll(); | |
return 0; | |
} | |
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