foo.cc: In function 'int main()':
foo.cc:69:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   69 |             scanf("%c",&temp);
      |             ~~~~~^~~~~~~~~~~~
foo.cc:71:22: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   71 |                 scanf("%c",&a[i][j]);
      |                 ~~~~~^~~~~~~~~~~~~~~

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