foo.cc: In function ‘int main()’:
foo.cc:5:9: warning: right operand of comma operator has no effect [-Wunused-value]
    5 | cin>>m,d;
      |         ^
foo.cc:7:14: warning: ‘d’ may be used uninitialized [-Wmaybe-uninitialized]
    7 |         {if(d%7==5){cout<<"Crazy Thursday V me 50";}
      |             ~^~
foo.cc:4:8: note: ‘d’ was declared here
    4 | {int m,d;
      |        ^

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