/in/foo.c: In function 'main':
/in/foo.c:4:21: warning: variable 'max' set but not used [-Wunused-but-set-variable]
  int n,a[10000],i,j,max,b,c,sum=0;
                     ^~~
/in/foo.c:4:19: warning: unused variable 'j' [-Wunused-variable]
  int n,a[10000],i,j,max,b,c,sum=0;
                   ^
/in/foo.c:15:11: warning: 'c' may be used uninitialized in this function [-Wmaybe-uninitialized]
    }  a[0]=c;
       ~~~~^~