/in/foo.c: In function 'main':
/in/foo.c:6:23: error: expected ';' before 'if'
    6 |         scanf("%f",&x)
      |                       ^
      |                       ;
    7 |         if(x<0)
      |         ~~             
/in/foo.c:5:17: warning: unused variable 'y' [-Wunused-variable]
    5 |         float x,y;
      |                 ^