foo.c: In function 'main':
foo.c:15:22: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'int' [-Wformat=]
   15 |             printf("%s",a[i]);
      |                     ~^  ~~~~
      |                      |   |
      |                      |   int
      |                      char *
      |                     %d
foo.c:17:5: error: 'retrun' undeclared (first use in this function)
   17 |     retrun 0;
      |     ^~~~~~
foo.c:17:5: note: each undeclared identifier is reported only once for each function it appears in
foo.c:17:11: error: expected ';' before numeric constant
   17 |     retrun 0;
      |           ^~
      |           ;

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