/in/foo.c: In function 'main':
/in/foo.c:11:20: error: expected ')' before 'c'
     printf("%.2f\n"c);
                    ^
/in/foo.c:11:16: warning: format '%f' expects a matching 'double' argument [-Wformat=]
     printf("%.2f\n"c);
                ^
/in/foo.c:4:13: warning: variable 'c' set but not used [-Wunused-but-set-variable]
     float f,c;
             ^