foo.c: In function 'pan':
foo.c:5:13: warning: unused variable 't' [-Wunused-variable]
    5 |         int t=x;
      |             ^
foo.c: In function 'main':
foo.c:21:1: error: expected declaration or statement at end of input
   21 | return 0;
      | ^~~~~~
foo.c: In function 'pan':
foo.c:11:6: warning: control reaches end of non-void function [-Wreturn-type]
   11 | }    }
      |      ^

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