foo.cc: In function 'int get()':
foo.cc:28:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^
foo.cc: In function 'void openfile()':
foo.cc:1066:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
     freopen("game.in","r",stdin);
     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~
foo.cc:1067:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
     freopen("game.out","w",stdout);
     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

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