date, time, and baning my head against the wall

This is a discussion on date, time, and baning my head against the wall within the C++ Programming forums, part of the General Programming Boards category; I've copies and pasted code from all over the place for the simple task of getting the system date and ...

  1. #1
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    date, time, and baning my head against the wall

    I've copies and pasted code from all over the place for the simple task of getting the system date and time, but not a single piece of code actually does what it's supposed to.

    Code:
    caibbor@helios ~ $ cat one.cpp 
    
    #include <time.h>
    
    void main() {
    char sdate[9];
    char stime[9];
    _strdate( sdate );
    _strtime( stime );
    }
    
    caibbor@helios ~ $ g++ one.cpp 
    one.cpp:4:11: error: '::main' must return 'int'
    one.cpp: In function 'int main()':
    one.cpp:7:17: error: '_strdate' was not declared in this scope
    one.cpp:8:17: error: '_strtime' was not declared in this scope
    caibbor@helios ~ $ cat two.cpp 
    //Date
    #include <iostream>
    #include <ctime>
     
    int main ()
    {
      char date [10];
      _strdate(date);
      std::cout<<"Current Date:"<<date;
      return 0;
    }
    
    
    caibbor@helios ~ $ g++ two.cpp 
    two.cpp: In function 'int main()':
    two.cpp:8:16: error: '_strdate' was not declared in this scope
    caibbor@helios ~ $ cat three.cpp 
    //Time
    #include <iostream>
    #include <ctime>
     
    int main ()
    {
      char time [10];
      _strtime(time);
      std::cout<<"Current Time:"<<time;
      return 0;
    } 
    
    
    caibbor@helios ~ $ g++ three.cpp 
    three.cpp: In function 'int main()':
    three.cpp:8:16: error: '_strtime' was not declared in this scope
    caibbor@helios ~ $

  2. #2
    and the Hat of Guessing tabstop's Avatar
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    14,185
    I suppose if "_strtime" or "_strdate" existed at all, you'd be somewhere. Since they don't....

    You can look up time.h/ctime if you want to see what's available there. You probably want ctime + time.

  3. #3
    Algorithm Dissector iMalc's Avatar
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    I would think that this one is a no-brainer:
    Code:
    one.cpp:4:11: error: '::main' must return 'int'
    Funnily enough this actually means that main must be declared as returning int, not void.
    You got it right two out of three times.
    My homepage
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  4. #4
    Frequently Quite Prolix dwks's Avatar
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    Are you looking for the time in any particular format? Because C++ includes a number of time and date functions in the <ctime> header file, inherited from C's time.h header. Here's a simple example.
    Code:
    #include <iostream>
    #include <ctime>
    
    int main() {
        time_t t;
        std::time(&t);
        std::cout << std::ctime(&t);
        return 0;
    }
    If you want more control start reading about <ctime>. A good place to start is "man ctime" (which brings you the man page for ctime, localtime, asctime, etc.).
    dwk

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