How do you write a standard C program to read date of birth andcurrent date and calculate age using stdioh?

Answer 1

I would use vi (or vim) for the actual typing in of the program and man to check up on the arguments to the functions I rarely use. (And [g]cc to compile the program.)

As to the actual program itself it would depend upon the target audience, that is if I was doing it as a program for me or someone else to use complete with mug-traps.

Basically I would use a while() loop to fgets() the birthdate; the current date I would pick up using time() followed by using localtime() to get the current yyyy/mm/dd. A simple calculation would ensue, taking into account any leap year corrections as necessary.

Obviously necessary sanity checking on inputs made (mug-trapping) would be done along with appropriate messages; as would inclusion of the relevant header files.

That should be enough hints to allow you to get it done.

Particularly, think about the use of fgets() as opposed to gets().