Cplusplus: Difference between revisions

Cplusplus (view source)

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 ...like so!
+==Functions: The Basics==
+It's now time to move on to '''functions'''. A function is basically the same thing as a method in Java: it is a sequence of commands which can be called upon at any time, passed parameters and set to return a value.
+main() is a function - the default function for a C++ program. But what if you have some code that you don't want to put into main? Use another function.
+Let's say we want to add two numbers together and print out the result. The code could look something like this:
+ #include <iostream>
+ using namespace std;
+ int add(int a, int b)
+ {
+    return a + b;
+ }
+ int main()
+ {
+    int a = 2;
+    int b = 5;
+    cout << add(a,b) << endl;
+    return(0);
+ }
+This program adds 2 and 5 together to get 7, and displays this answer on-screen.
+a and b are passed as ''parameters'' to the add function - they are then immediately added together and the answer is returned. Experiment with this code to do different things.
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