foo.cc: In function ‘int main()’:
foo.cc:33:40: error: unable to find character literal operator ‘operator""t’ with ‘char’ argument
   33 |         cout<<a[i].id<<' '<<a[i].name<<' 't<<a[i].yu<<' '<<a[i].shu<<' '<<a[i].ying<<' '<<a[i].wu<<' '<<a[i].hua<<' '<<a[i].tot<<' '<<endl;
      |                                        ^~~~