foo.c: In function 'FindiMinPos':
foo.c:23:16: warning: 'Index' may be used uninitialized [-Wmaybe-uninitialized]
   23 |         return Index;
      |                ^~~~~
foo.c:5:17: note: 'Index' was declared here
    5 |         int min,Index;
      |                 ^~~~~
foo.c:18:19: warning: 'min' may be used uninitialized [-Wmaybe-uninitialized]
   18 |                 if(a[i]<min)
      |                   ^
foo.c:5:13: note: 'min' was declared here
    5 |         int min,Index;
      |             ^~~

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