I want to make a function that accepts 3 calling parameters but one of which is either be a string or an integer. So in an attempt to realise it I started to play with the following.
But I get a warning on APItest.c(62): error: #137: expression must be a modifiable lvalue.
I just cannot get it to work. From what I can find in the Keil manual it should work. I would really appreciate some guidence.
Note I can only look at the results in the watch window if I declare the struct in main as static - is that only way?
#define STRING 'S' #define INTEGER 'I' struct one_line { char type; int sn_id; int frm_id; union { char sp[20]; int si; }tag; }; int main(void) { static struct one_line api; api.frm_id= 0x04; api.type = INTEGER; api.tag.si = 0x0300; api.type = STRING; api.tag.sp = "Hello"; \ error on this item etc
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