/***
Example7.c: Function calls
***/

struct t_s
{
     int p, q;
};

extern struct t_s extStruct(int a, int b, int c);
extern int extInt(struct t_s s);

int foo(int a, int b)
{
     struct t_s s;
     return extStruct (a, b, b).q + extInt(s);
}