Lesson 4 Source Code

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Lesson 4 Video

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Lesson 4: Variables part 2: Assigning variables

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A little more on Declaring and assigning variables


The main emphasis on this video is ONE AND ONLY ONE VARIABLE will go onthe left hand side of the assignment operator (=) while any other expression can go on the right hand side.The value on the right hand side will be the new value of the ONE varibale on the left hand side.
#include <iostream>
using namespace std;

int main()
{
 int apples;
 apples = 19;
 int oranges;
 oranges = 29;
 int fruit = apples + oranges;

 cout << "There are " << apples << " apples" << endl;
 cout << "There are " << oranges << " oranges" << endl;
 cout << "There are " << fruit << " fruit" << endl;
 cin.get();
 return 0;
}

Variables can be re-assigned a different value throughout different points of the program.
#include <iostream>
using namespace std;

int main()
{
 int apples;
 apples = 19;
 int oranges;
 oranges = 29;
 int fruit = apples + oranges;

 cout << "There are " << apples << " apples" << endl;
 
 apples = 12;

 cout << "There are " << apples << " apples" << endl;
 cin.get();
 return 0;
}

#include <iostream>
using namespace std;

int main()
{
 int apples;
 apples = 19;
 int oranges;
 oranges = 29;
 int fruit = apples + oranges;

 cout << "There are " << apples << " apples" << endl;
 cout << "There are " << oranges << " oranges" << endl;

 apples = oranges;

 cout << "There are " << apples << " apples" << endl;
 cout << "There are " << oranges << " oranges" << endl;
 cin.get();
 return 0;
}
In this example, apples and oranges will be equal to 29 because the value of the right hand side of the assignment operator

#include <iostream>
using namespace std;

int main()
{
 int apples;
 apples = 19;
 int oranges;
 oranges = 29;
 int fruit = apples + oranges;

 cout << "There are " << apples << " apples" << endl;
 cout << "There are " << oranges << " oranges" << endl;

 oranges = apples;

 cout << "There are " << apples << " apples" << endl;
 cout << "There are " << oranges << " oranges" << endl;
 cin.get();
 return 0;
}
In this example, apples and oranges will be equal to 29 because the value of the right hand side of the assignment operator