/* File : example.c */
/* A global variable */
double Foo = 3.0;
int add1(int x, int y)
{
return x+y;
}
void add2(int x, int *y, int *z)
*z = x+*y;
int add3(int x, int y, int *z)
*z = x-y;
void add4(int x, int *y)
*y += x;