/in/foo.c: In function 'main':
/in/foo.c:4:2: warning: 'i' is used uninitialized in this function [-Wuninitialized]
  int i,S[i],c[5],A[5];
  ^~~
/in/foo.c:14:15: warning: iteration 4 invokes undefined behavior [-Waggressive-loop-optimizations]
      if(c[h]>c[h+1])
              ~^~~~~
/in/foo.c:13:2: note: within this loop
  for(h=0;h<=4;h++)
  ^~~