/in/foo.c: In function 'A':
/in/foo.c:18:10: warning: unused variable 'j' [-Wunused-variable]
  int i,m,j,a2max,max=a[0],imax=0;
          ^
/in/foo.c:26:5: warning: 'a2max' may be used uninitialized in this function [-Wmaybe-uninitialized]
   if(a[i]>a2max && (a[i]<=max && i!=imax))
     ^
/in/foo.c:28:9: warning: 'm' may be used uninitialized in this function [-Wmaybe-uninitialized]
  return m;
         ^