foo.c: In function 'main':
foo.c:6:10: warning: statement with no effect [-Wunused-value]
    6 |         x>=0;
      |         ~^~~
foo.c:7:10: warning: statement with no effect [-Wunused-value]
    7 |         y>=0;
      |         ~^~~
foo.c:8:17: warning: format '%d' expects argument of type 'int *', but argument 2 has type 'int' [-Wformat=]
    8 |         scanf("%d %d",x,y);
      |                ~^     ~
      |                 |     |
      |                 int * int
foo.c:8:20: warning: format '%d' expects argument of type 'int *', but argument 3 has type 'int' [-Wformat=]
    8 |         scanf("%d %d",x,y);
      |                   ~^    ~
      |                    |    |
      |                    |    int
      |                    int *
foo.c:8:9: warning: 'x' is used uninitialized [-Wuninitialized]
    8 |         scanf("%d %d",x,y);
      |         ^~~~~~~~~~~~~~~~~~
foo.c:8:9: warning: 'y' is used uninitialized [-Wuninitialized]

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