c++ Lessons

[Blaine]

Lesson one "Hello world" application.

Source

#include<iostream>
using namespace std;

int main() {
cout << " Hello world";
return 0;
}

#include<iostream> - allows for the use of cout and cin.

using namespace std; - makes its so yo dont have to put std:: infront of cout and cin.

int main() is the main function and all the code within the brackets defines it.

cout << - console output

"Hello World";- Prints whatever is within the " " the semicolon ends a statement in c++. People Just starting out usualy forget to use this.

return 0; - ends the progam

[Blaine]

Lesson 2 - "Converting Tempatures"

formula for celsius to Fahrenheit-
Fahrenheit = (celsius * 1.8) + 32

variable types

(Name) (Examle)

(int) (10)
(Char) ('c')
(String) ("this is a string")
(bool) (true)
(double) (1.0)
(long) (10L)
(short) (27)

source-

#include <iostream>
using namespace std;

int main () {
double ctep, ftemp;

cout << "Input a Celsius Tem and press ENTER: "
cin >> ctemp;
ftemp = (ctemp * 1.8) + 32;
cout<< "Fahrenheit temp is: " << temp;

return 0;
}

cin - allows for you to enter the double ctemp