/in/foo.cc: In function 'int main()':
/in/foo.cc:5:13: warning: unused variable 'd' [-Wunused-variable]
    5 |     int b,c,d,e,f,g,h,i,j;
      |             ^
/in/foo.cc:5:15: warning: unused variable 'e' [-Wunused-variable]
    5 |     int b,c,d,e,f,g,h,i,j;
      |               ^