Daniel Haehn PRO
Hi, I am a biomedical imaging and visualization researcher who investigates how computational methods can accelerate biological and medical research.
Please stay healthy!
Remote Lectures
All Meetings
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Loraine will take attendance!
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High Quality Work!
Self-Motivation!
Despite the chaos:
2/7
2/21
2/28
3/27
5/22
Team Selection
Client Presentations
Project Proposal
Revised Project Proposal
Final Project Documentation
No class
No class
No class
Project Presentations
5/04
No class
Implementation / Testing / Deployment
57 Days
Revised Project Proposal
Due Today!
Can we start coding?
Most important
Revised Project Proposal
Will it still change?
Yes!
You will get feedback.
Revised Project Proposal
After feedback, copy it over..
Final Project Documentation
Due 5/22!
Keep updating it while you code..
Lecture 17
Hands-on Day! (C++ Functions and Classes)
Lecture 17
Hands-on Day! (C++ Functions and Classes)
Lecture 17
Hands-on Day! (C++ Functions and Classes)
#include <iostream>
int main()
{
std::string temp;
std::cout << "Please enter a temperature in F. ";
std::cin >> temp;
float convertedTemp = std::stof(temp) - 32 / 1.8;
std::cout << "Converted to Celsius, this temperature is "
<< convertedTemp << "!\n";
}
Lecture 17
Hands-on Day! (C++ Functions and Classes)
#include <iostream>
int main()
{
std::string temp;
std::cout << "Please enter a temperature in F. ";
std::cin >> temp;
float convertedTemp = ( std::stof(temp) - 32 ) / 1.8;
std::cout << "Converted to Celsius, this temperature is "
<< convertedTemp << "!\n";
}
Lecture 17
Hands-on Day! (C++ Functions and Classes)
#include <iostream>
int main()
{
float temp;
std::cout << "Please enter a temperature in F. ";
std::cin >> temp;
float convertedTemp = ( temp - 32 ) / 1.8;
std::cout << "Converted to Celsius, this temperature is "
<< convertedTemp << "!\n";
}
Hidden Casting!
Lecture 17
Hands-on Day! (C++ Functions and Classes)
// part 2
class Converter {
public:
float fromFtoC(float);
};
float Converter::fromFtoC(float temp) {
return ((temp-32)/1.8);
}; //... in main
Converter c;
float convertedTemp = c.fromFtC(temp);
//...Lecture 17
Hands-on Day! (C++ Functions and Classes)
// part 2
class Converter {
public:
float fromFtoC(float);
};
float Converter::fromFtoC(float temp) {
return ((temp-32)/1.8);
}; //... in main
Converter *c = new Converter;
float convertedTemp = c->fromFtoC(temp);
//...Pointer to the instance!
Lecture 17
Hands-on Day! (C++ Functions and Classes)
//... in main
Converter *c = new Converter;
float convertedTemp = c->fromFtoC(temp);
//...Pointer to the instance!
//... in main
Converter *c;
float convertedTemp = c->fromFtoC(temp);
//...Wild pointer!
std::unique_ptr<Converter> c(new Converter());
c->fromFtoC(temp);One way to avoid wild pointers...
Templates.. (next week)
Lecture 17
Hands-on Day! (C++ Functions and Classes)
// part 2
class Converter {
public:
float fromFtoC(float);
};
float Converter::fromFtoC(float temp) {
return ((temp-32)/1.8);
}; //... in main
Converter *c = new Converter;
float convertedTemp = c->fromFtoC(temp);
//... //... somewhere else in the code
Converter *c = new Converter;
float convertedTemp = c->fromFtoC(temp);
//... //... somewhere else again
Converter *c = new Converter;
float convertedTemp = c->fromFtoC(temp);
//...3 instances!
Lecture 17
Hands-on Day! (C++ Functions and Classes)
//... Everywhere!
SingletonConverter *c = SingletonConverter::getInstance()
float convertedTemp = c->fromFtC(temp);
//... //... in main
Converter *c = new Converter;
float convertedTemp = c->fromFtoC(temp);
//... //... somewhere else in the code
Converter *c = new Converter;
float convertedTemp = c->fromFtoC(temp);
//... //... somewhere else again
Converter *c = new Converter;
float convertedTemp = c->fromFtoC(temp);
//...Always use the same instance!
Lecture 17
Hands-on Day! (C++ Functions and Classes)
//... in main
Converter *c = new Converter;
float convertedTemp = c->fromFtoC(temp);
//... //... somewhere else in the code
Converter *c = new Converter;
float convertedTemp = c->fromFtoC(temp);
//... //... somewhere else again
Converter *c = new Converter;
float convertedTemp = c->fromFtoC(temp);
//...3x Converter
//... in main
SingletonConverter *c = SingletonConverter::getInstance()
float convertedTemp = c->fromFtC(temp);
//... //... somewhere else in the code
SingletonConverter *c = SingletonConverter::getInstance()
float convertedTemp = c->fromFtC(temp);
//... //... somewhere else again
SingletonConverter *c = SingletonConverter::getInstance()
float convertedTemp = c->fromFtC(temp);
//...1x Converter
Lecture 17
Hands-on Day! (C++ Functions and Classes)
// part 3
class SingletonConverter
{
public:
static SingletonConverter* getInstance( ) {
return instance;
};
~SingletonConverter( );
float fromFtoC(float temp) {
return ((temp-32)/1.8);
};
private:
SingletonConverter( );
static SingletonConverter* instance;
}; //... in main
SingletonConverter *c = SingletonConverter::getInstance()
float convertedTemp = c->fromFtC(temp);
//...Lecture 17
Hands-on Day! (C++ Functions and Classes)
// part 3
class SingletonConverter
{
public:
static SingletonConverter* getInstance( ) {
static SingletonConverter* instance;
return instance;
};
~SingletonConverter( );
float fromFtoC(float temp) {
return ((temp-32)/1.8);
};
private:
SingletonConverter( );
}; //... in main
SingletonConverter *c = SingletonConverter::getInstance()
float convertedTemp = c->fromFtC(temp);
//...Lazy Loading!
Arrays and
Vectors
Variable
Array
int carton[10];int carton[10] = { };int carton[10] = { 1, 3, 7 };
Array is full..
Larger Array...
It will be full eventually...
What about a dynamic container?
Vector
Let's try it!
#include <iostream>
class SingletonConverter
{
public:
static SingletonConverter* getInstance( ) {
return instance;
};
~SingletonConverter( );
float fromFtoC(float temp) {
return ((temp-32)/1.8);
};
private:
SingletonConverter( );
static SingletonConverter* instance;
};
int main()
{
std::string temp;
std::cout << "Please enter a temperature. ";
std::cin >> temp;
std::cout << "Converted to Celsius, this temperature is " << SingletonConverter::getInstance()->fromFtoC(std::stof(temp)) << "!\n";
}
CS410 Lecture 20
By Daniel Haehn
CS410 Lecture 20
Slides for CS410 Software Engineering at UMass Boston. See https://cs410.net!
