1 #include <stdio.h>
2 
3 extern void func(void);
4 
main(void)5 int main(void)
6 {
7   printf("Hello from prog1.c\n");
8   func();
9   /*
10    * Uncomment to test same-named files in different directories,
11    * which Visual Studio doesn't support.
12   subdir1_func();
13   subdir2_func();
14    */
15   return 0;
16 }
17