calculate age from date

This is a discussion on calculate age from date within the C Programming forums, part of the General Programming Boards category; Hi guys i have the following code and i am trying to ask for user input and then calculate the ...

  1. #1
    Musicman - Canora
    Join Date
    Aug 2005
    Location
    Melbourne
    Posts
    252

    calculate age from date

    Hi guys i have the following code and i am trying to ask for user input and then calculate the users age from the system date. So if the user enters 01/01/1985 and it compares it to the current date it should say that they are 7374 days old. How could i calculate that i am having difficuly i have exstracted the system date already.


    Code:
    void calage()
    {
     char buff[BUFSIZ];
     char date[12];
     int m,d,y;
     char dateTen;
     char dateUnit;
     char dateTotal;
    
    
    
    
    
     struct tm t;
     time_t now;    /* time struct*/
    
    
    
     time(&now);   /* put time into the &now variable*/
     t = *localtime(&now);     /* exstract the system time*/
     strftime(buff, sizeof(buff), "%d//%m//%y", &t); /* format the string*/
    
    
    
     /*printf("m = %d, d = %d, y = %d\n", m, d, y); */
    
    
     printf("The current date is %s\n",buff);    /* print the date to the screen*/
    
    
    
    }

  2. #2
    Just Lurking Dave_Sinkula's Avatar
    Join Date
    Oct 2002
    Posts
    5,006
    FAQ > How do I... (Level 2) > Work with dates and times
    7. It is easier to write an incorrect program than understand a correct one.
    40. There are two ways to write error-free programs; only the third one works.*

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