1 extern "C" int csub (int); 2 int foo(int x)3 foo (int x) 4 { 5 return csub (x / 2); 6 } 7 8 extern "C" int cppsub_ (int *); 9 int cppsub_(int * y)10 cppsub_ (int *y) 11 { 12 return foo (*y); 13 } 14