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| − | '''It is recommended to use an IDE, for a tutorial on how to set one up click''' [http://www.cprogramming.com/code_blocks/ HERE] <br />
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| − | Other great resource for learning [http://www.learncpp.com/ C++] from the ground up.
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| | | | |
| − |
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| − | == Printing text to the screen ==
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| − |
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| − | <nowiki>
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| − | //Text that starts with "//" is ignored by the compiler
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| − | //This is the library that allows you to use the "cout" and "endl" objects
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| − | #include <iostream>
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| − |
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| − | // int main is where you will be writing your code example
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| − | // int main(){code goes here}
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| − | int main()
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| − | {
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| − | // std::cout is sending the text to your screen
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| − | // std::endl creates a new line
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| − | // note: 'std::' means you are using a member of the namespace 'std'
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| − | // more on that later.
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| − | std::cout << "This text will appear on your sceen" << std::endl;
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| − | std::cout << "This text will appear on your sceen" << std::endl;
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| − | // note: all statements must end with a ; such as above
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| − |
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| − |
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| − | return 0;
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| − | }
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| − | </nowiki>
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| − |
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| − | ----
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| − |
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| − |
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| − | == Using Data ==
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| − |
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| − | <nowiki>
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| − | #include <iostream>
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| − |
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| − | int main()
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| − | {
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| − | // Numbers in C (or C++) can be stored in variables
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| − | // Each type can store a different type of data
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| − | // For example an int is created by typing keyword int followed by a name, for this example bill
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| − | int bill; //this int can store Integers -3 -2 -1 0 1 2 3 etc
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| − | bool tom; //can store true or false
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| − | float jim; //can store a decimal
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| − | char tommy; //this takes characters such as 'x' or 'b'
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| − |
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| − | // variables can be created with no data and set later in the program such as here
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| − | bill = 5;
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| − | tom = true;
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| − | jim = 1.5;
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| − | tommy = 'b';
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| − |
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| − | // just to prove everything works we will print these to the screen
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| − | std::cout<< "BIL "<<bill<<std::endl;
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| − | std::cout<< "TOM "<<tom<<std::endl;
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| − | std::cout<< "JIM "<<jim<<std::endl;
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| − | std::cout<< "TOMMY "<<tommy<<std::endl;
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| − | // note: tom will appear as 1 or 0 depending on the true/false state
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| − |
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| − | return 0;
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| − | }
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| − | </nowiki>
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| − |
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| − | ----
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| − |
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| − | == Conditions ==
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| − |
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| − | <nowiki>
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| − | #include <iostream>
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| − |
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| − | int main()
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| − | {
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| − |
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| − | int bill = 5;
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| − | char tommy = 'b';
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| − | // the if statement will look if the condition inside its brackets is true,
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| − | // if it is it will run the block of code below
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| − | // we are using the Equal to operator "==" to check if bill is equal to 5
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| − |
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| − | // other operators include
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| − | // != Not equal to
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| − | // > Greater than
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| − | // <= Less than or equal to
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| − | // >= Greater than or equal to
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| − |
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| − | if(bill == 5)
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| − | {
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| − | tommy = 'X';
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| − | // because bill is equal to 5 tommy will become X
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| − | }
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| − |
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| − | if(bill == 6)
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| − | {
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| − | tommy = 'Y';
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| − | //because bill is not equal to 6 this code is ignored
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| − | }
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| − |
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| − | std::cout<< "TOMMY "<<tommy<<std::endl;
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| − |
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| − | return 0;
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| − | }
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| − | </nowiki>
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| − |
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| − | ----
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| − |
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| − | == Loops ==
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| − |
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| − | <nowiki>
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| − | #include <iostream>
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| − |
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| − | int main()
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| − | {
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| − | int bill = 5;
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| − | char tommy = 'b';
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| − |
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| − | // like if, the while loop will run code if the condition is true
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| − | // unlike if, while loops do not stop until the condition becomes false
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| − | // below we used the Not equal to operator to check if bill is not equal to 0
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| − | while (bill != 0)
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| − | {
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| − | //while bill is not equal to 0 the loop will run and print out tommy
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| − | std::cout<< "TOMMY "<<tommy<<std::endl;
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| − |
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| − | //the loop will also reduce bill by 1 each time it runs:
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| − | bill--;
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| − | //thanks to the decrement operator "bill--" bill could also be Incremented with "bill++"
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| − | }
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| − |
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| − | return 0;
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| − | }
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| − | </nowiki>
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| − |
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| − | [[Category:Programming]]
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| − | [[Category:Tutorials]]
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| − | [[Category:HowTo]]
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| − | [[Category:Programming languages]]
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