1 #include <stdio.h> 2 3 #include "foo.h" 4 #include "bar.h" 5 main()6 int main() { 7 int x = 10; 8 printf("foo(%d) = %d\n", x, foo(x)); 9 printf("bar(%d) = %d\n", x, bar(x)); 10 return 0; 11 } 12