/in/foo.c: In function 'main':
/in/foo.c:5:27: warning: unused variable 'i' [-Wunused-variable]
     int count[20000],kind,i;
                           ^
/in/foo.c: In function 'compare':
/in/foo.c:26:16: error: 'count' undeclared (first use in this function)
             if(count[j]>count[j+1])
                ^~~~~
/in/foo.c:26:16: note: each undeclared identifier is reported only once for each function it appears in