/in/foo.c: In function 'main':
/in/foo.c:9:14: warning: format '%f' expects argument of type 'double', but argument 2 has type 'int' [-Wformat=]
   printf("%.6f",a);
              ^
/in/foo.c:13:14: warning: format '%f' expects argument of type 'double', but argument 2 has type 'int' [-Wformat=]
   printf("%.6f",b);
              ^