Accessing an array across files in C -

i'm trying access array across files, this;

int option[number_of_options]; ... addition(&option[0], num1, num2);  ... printf("%d", option[0]);

thats first(main) file

and second this;

void addition(int * option, unsigned number1, unsigned number2) { int total = number1 + number2; ... *option ++; }

something that. dont worry addition method.

the problem printf method allways prints 0, if *option ++; never executed/read.

how fix this?

by way, warning in "*option++;" file saying: warning: value computed not used.

how solve problem?

thank you!

this:

*option++;

doesn't think does. means is:

*(option++);

which first applies increment operator option pointer , dereferences afterwards. effect is:

option++; *option; // statement no effect, hence warning.

you need instead:

(*option)++;

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