/in/foo.c: In function 'FindMaxIndex':
/in/foo.c:38:9: warning: 'index' may be used uninitialized in this function [-Wmaybe-uninitialized]
  int i, index, flag=0;
         ^~~~~
/in/foo.c: In function 'FindSecMax':
/in/foo.c:80:9: warning: 'index' may be used uninitialized in this function [-Wmaybe-uninitialized]
  return index;
         ^~~~~