/in/foo.c: In function 'main':
/in/foo.c:9:14: warning: unused variable 'c' [-Wunused-variable]
  int a=1,b=2,c=3;
              ^
/in/foo.c:9:10: warning: unused variable 'b' [-Wunused-variable]
  int a=1,b=2,c=3;
          ^
/in/foo.c:9:6: warning: unused variable 'a' [-Wunused-variable]
  int a=1,b=2,c=3;
      ^