/in/foo.cc: In function 'int main()':
/in/foo.cc:17:14: error: unable to find character literal operator 'operator""and' with 'char' argument
   if (a[it]=='5'and a[it]=='6'and a[it]=='7'and a[it]=='8'and a[it]=='9') {
              ^~~~~~
/in/foo.cc:17:21: error: expected ')' before 'a'
   if (a[it]=='5'and a[it]=='6'and a[it]=='7'and a[it]=='8'and a[it]=='9') {
                     ^