/in/foo.cc: In function 'int hwlength(int)':
/in/foo.cc:27:9: warning: variable 'a' set but not used [-Wunused-but-set-variable]
     int a[10],i=0;
         ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:61:13: warning: unused variable 'j' [-Wunused-variable]
     int b,i,j;
             ^