# Object Oriented Programming
---
## Environment checking
```cpp=
#include<iostream>
using namespace std;
int main(void){
cout << "Hello, World!" << endl;
return 0;
}
```
---
## Beacon
:::info
- A beacon system
- Print I'm Fine every 1 seconds
:::
[Sleep Reference](https://stackoverflow.com/questions/158585/how-do-you-add-a-timed-delay-to-a-c-program)
```cpp=
#include <ctime>
void sleep(float seconds){
clock_t startClock = clock();
float cps = CLOCKS_PER_SEC;
float duration = seconds * cps;
while(true){
if (clock() > startClock+duration)
break;
}
return;
}
```
----
```cpp=
#include <iostream>
#include <ctime>
using namespace std;
void sleep(float seconds){
clock_t startClock = clock();
float cps = CLOCKS_PER_SEC;
float duration = seconds * cps;
while(true){
if (clock() > startClock+duration)
break;
}
return;
}
int main (void){
while(true){
cout << "I'm Fine" << endl;
sleep(1.0);
}
}
```
---
## Here come's the PM
:::info
:::
----
```cpp=
#include <iostream>
#include <ctime>
using namespace std;
void sleep(float seconds){
clock_t startClock = clock();
float cps = CLOCKS_PER_SEC;
float duration = seconds * cps;
while(true){
if (clock() > startClock+duration)
break;
}
return;
}
int main (void){
int time = 0;
while(true){
if (time % 1 == 0)
cout << "I'm Fine" << endl;
if (time % 2 == 0){
cout << "Sensor Fine" << endl;
cout << "ADCS Fine" << endl;
cout << "EPS Fine" << endl;
cout << "Antenna Fine" << endl;
cout << "GPS Receiver Fine" << endl;
cout << "OBC Fine" << endl;
cout << "Payload Fine" << endl;
cout << "Structure Fine" << endl;
}
sleep(1.0);
time ++;
}
}
```
---
## Readability
:::info
:::
```cpp=
#include <iostream>
#include <ctime>
using namespace std;
void sleep(float seconds){
clock_t startClock = clock();
float cps = CLOCKS_PER_SEC;
float duration = seconds * cps;
while(true){
if (clock() > startClock+duration)
break;
}
return;
}
void checkSensorStatus(){
cout << "Sensor Fine" << endl;
}
void checkADCSStatus(){
cout << "ADCS Fine" << endl;
}
void checkEPSStatus(){
cout << "EPS Fine" << endl;
}
void checkAntennaStatus(){
cout << "Antenna Fine" << endl;
}
void checkGPSReceiverStatus(){
cout << "GPS Receiver Fine" << endl;
}
void checkOBCStatus(){
cout << "OBC Fine" << endl;
}
void checkPayloadStatus(){
cout << "Payload Fine" << endl;
}
int main (void){
bool flag = 0;
while(true){
cout << "I'm Fine" << endl;
if (flag){
checkSensorStatus();
checkADCSStatus();
checkEPSStatus();
checkAntennaStatus();
checkGPSReceiverStatus();
checkOBCStatus();
checkPayloadStatus();
}
sleep(1.0);
flag = !flag;
}
}
```
---
## Timing
```cpp=
#include <iostream>
using namespace std;
int main (void){
int time = 0;
while(true){
if (time % 2 == 0){
cout << "2";
}
if (time % 3 == 0){
cout << "3";
}
sleep(1);
time ++;
}
for (int a = 0; ; a++){
if (a % 2 == 0){
cout << "2";
}
if (a % 3 == 0){
cout << "3";
}
sleep(1);
}
return 0;
}
```
---
## Class
```cpp=
#include <iostream>
using namespace std;
class Subsystem{
public:
Subsystem() {
cout << "print while created" << endl;
}
};
int main (void){
cout << "Do something first" << endl;
Subsystem EPS = Subsystem();
cout << "Do something second" << endl;
cin.get();
return 0;
}
```
----
## Function
```cpp
#include <cstring>
class Subsystem{
public:
string name;
Subsystem(string subsystem_name) {
name = subsystem_name;
cout << name << " created" << endl;
}
void checkStatus(){
cout << name << " Fine" << endl;
}
};
```
----
```cpp
#include <cstring>
int main (void){
cout << "Do something first" << endl;
Subsystem EPS = Subsystem("EPS");
cout << "Do something second" << endl;
cin.get();
return 0;
}
```
----
## Constructors
```cpp=
#include <cstring>
#include <iostream>
using namespace std;
class Subsystem{
public:
string name;
Subsystem(string subsystem_name) {
name = subsystem_name;
cout << name << " created" << endl;
}
Subsystem(){
cout << "I am an empty subsystem" << endl;
}
void checkStatus(){
cout << name << " Fine" << endl;
}
};
int main (void){
cout << "Do something first" << endl;
Subsystem EPS = Subsystem("EPS");
Subsystem epty = Subsystem();
/*
ESP <- Subsystem class -> call constructor (Subsystem()(yellow));
Subsystem() <- calling method (Call while created)
*/
cout << "Do something second" << endl;
cin.get();
return 0;
}
```
## Change our code
:::info
:::
```cpp=
#include <cstring>
#include <iostream>
using namespace std;
class Subsystem{
public:
string name;
Subsystem(string subsystem_name) {
name = subsystem_name;
cout << name << " created" << endl;
}
void checkStatus(){
cout << name << " Fine" << endl;
}
};
int main (void){
cout << "Do something first" << endl;
Subsystem *EPS = new Subsystem("EPS");
EPS -> checkStatus();
cout << "Do something second" << endl;
delete EPS;
cin.get();
return 0;
}
```
----
## Future use
```cpp=
#include <cstring>
#include <iostream>
#include <ctime>
#include <vector>
using namespace std;
void sleep(float seconds){
clock_t startClock = clock();
float cps = CLOCKS_PER_SEC;
float duration = seconds * cps;
while(true){
if (clock() > startClock+duration)
break;
}
return;
}
class Subsystem{
public:
string name;
int temp;
Subsystem(string subsystem_name){
name = "I'm ";
}
Subsystem(string subsystem_name, int subsystem_temp) {
name = subsystem_name;
temp = system_temp;
cout << name << " created" << endl;
}
void checkStatus(){
cout << name << " Fine" << endl;
}
void checkTemp(){
cout << name << " " << temp << " degree c" << endl;
}
};
int main (void){
vector<Subsystem> subsystems;
subsystems.push_back(Subsystem("EPS", 25));
subsystems.push_back(Subsystem("OBC", 22));
subsystems.push_back(Subsystem("ADCS", 21));
subsystems.push_back(Subsystem("Payload", 45));
subsystems.push_back(Subsystem("Antenna", 22));
subsystems.push_back(Subsystem("Sensor", 23));
subsystems.push_back(Subsystem("GPS Reciever", 23));
Subsystem beacon = Subsystem("Beacon");
int time = 0;
while(true){
beacon.checkStatus();
if (time % 2 == 0){
for (Subsystem subsystem : subsystems){
subsystem.checkStatus();
}
}
if (time % 3 == 0){
for (Subsystem subsystem : subsystems){
subsystem.checkTemp();
}
}
sleep(1);
time ++;
}
return 0;
}
```
{"metaMigratedAt":"2023-06-16T07:22:34.300Z","metaMigratedFrom":"YAML","title":"Introduction to C++ OOP","breaks":true,"GA":"UA-208228992-1","contributors":"[{\"id\":\"bdcee32f-5dc2-4add-94fa-e418d7247ad0\",\"add\":8311,\"del\":311}]"}