/in/foo.cc: In function 'char* quling(char*, char*)':
/in/foo.cc:14:8: warning: statement has no effect [-Wunused-value]
   for(x;x<y;x++){
        ^
/in/foo.cc: In function 'int cmp(char*, char*, char*, char*)':
/in/foo.cc:36:10: warning: statement has no effect [-Wunused-value]
    for(a1;a1<b1;a1++,a2++){
          ^