print only data with invalid dates

[larkjr18]

Isn't that what the length statement does? Create the num_dob variable?

[ballardw]

data hi.student (drop=i);
   infile 'C:\Users\larkj\Desktop\STUDENT.DAT';
   length num_dob 8;
   input ssn 1-9 sex $ 11 term 17 type $ 19 div $ 21-24
   major 26-30 ed $ 32 state $ 34-35 sat 37-40 satm 42-44
   satv 46-48 gpa 50-53 rank 55-58 act 60-63 toefl 65-68
   honor $ 70 ethnic 72 year_dob 101-102 month_dob 103-104
   day_dob 105-106
   ;
   num_dob= input(char_dob,mmddyy10.);  /*<==== where does a value for char_dob come from??
                                        it is not on the input statement*/
   if char_dob eq '0' then call missing(num_dob);
   else num_dob=input(char_dob,mmddyy10. ??);
   Char_DOB = input(catx("/", month_dob, day_dob, year_dob),?? mmddyy8.); /* value assigned AFTER use above*/
   Total_DOB = input(catx("/", month_dob, day_dob, year_dob),?? mmddyy8.);