PicC 9.50 dsPIC Manual.pdf

Error and Warning Messages(277) can’t mix proto and non-proto args (Parser)A function declaration can only have all prototyped arguments (i.e. with types inside the parentheses)or all K&R style args (i.e. only names inside the parentheses and the argument types in a declarationlist before the start of the function body), e.g.:int plus(int a, b) /* woops -- a is prototyped, b is not */int b;{return a + b;}(278) argument redeclared: * (Parser)The specified argument is declared more than once in the same argument list, e.g.int calc(int a, int a) /* you cannot have two parameters called “a” */(279) can’t initialize arg (Parser)A function argument can’t have an initialiser in a declaration. The initialisation of the argumenthappens when the function is called and a value is provided for the argument by the calling function,e.g.:extern int proc(int a = 9); /* woops -- a is initialized when proc is called */(280) can’t have array of functions (Parser)You can’t define an array of functions. You can however define an array of pointers to functions,e.g.:int * farray[](); /* woops -- should be: int (* farray[])(); */(281) functions can’t return functions (Parser)A function cannot return a function. It can return a function pointer. A function returning a pointerto a function could be declared like this: int (* (name()))(). Note the many parentheses that arenecessary to make the parts of the declaration bind correctly.259