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Functions
Lucas Menezes edited this page Sep 22, 2020
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4 revisions
Functions have three things:
- name
- return type
- parameters
And are declared like this:
type name (parameters)
examples:
void func();
short pow(short x, short y);
byte opposite(byte a);
void means no type, and in this case, means the function func has no return.
functions need to be associated to a block of code, i.e. its definition
In Headache functions are defined like this:
void hello() {
@"Hello!\n";
}
byte opposite(byte a) {
return -a;
}
short pow(short x, short y){
short r,z;
r=1;
z = y;
while(z){
r = r*x;
z--;
}
return r;
}
Note that the void function has no return, like its supposed.
The return must contain the expression that contains the result of its execution.
Headache requires that a function that has return must have its return as the last command of the function
name(arguments);
it will result in an expression which contains the result of the function
result = pow(base,exponent);
@"The opposite of "; @a; " is "; @opposite(a);