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Wirting/executing file

IWishIKnew (1364)
I want to make a program that shuts down my computer after a user-specified alloted time. I can't figuer out, though, how to write to a file (specifically batch) and then run it (and then preferebly when it's done executing, delete it). I looked it the tutorial reference, but i'm not sure how to correctly write the syntax.
Azagaros (410)
why does this sound like we are writing a virus?

Shutting down a computer is using and prompting the current user if they want to shut down the computer on most modern operating systems. Doing it blindly as you want could be called suspicious at best. This assumes I am leaving something for computer to do after I restarted the computer or I have left damage on the disk preventing it from restarting.

Most everything you have described can be done from C++ and an operating system's API, which is specific to the operating system. Again this sounds suspicious.
IWishIKnew (1364)
nonononono. I have found that this is a very helpful technique. I'm a gamer and somtimes i like to download games (such as Cabal online, wich takes 3 hours to download) and i dont like leaving my computer on for 12 hours straight if it's 10:00pm and i have to sleep. I have encountered these kinds of senarios where a delayed shutdown (in command prompt it is "shutdown.exe /s /f /t [time in second]) would be helpful to a user who takes good care of his or her computer. I already created a program that does this in the BASIC language and i want to excersize it useing C++. This would tech me how to write files, read from files and run files, calculate math, and integrate a consol menu all using C++.

btw, im only a beginner, so i would probably end up screwing myself trying to make a virus anyway.

so, that aside, i have already made some code for this little project of mine, but it seems to not execute the functions within. It's really wierd. If you could help me, that would be great. Here is the code:

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#include <iostream>
#include <fstream>
#include <string>
using namespace std;

int ms (int minutes)
{
    int sec;
    sec = (minutes * 60);
    return sec;
}

int shutdn ()
{
    unsigned int sec;
    string c;
    unsigned int minutes;
    cout<< "Give then number of minutes until shutdown:  "<< endl; cin>> minutes;
    sec = ms (minutes);
    cout<< "Seconds until Shutdown: "<< sec<< endl;
    cout<< "Press enter to continue: ";
    cin.get();
    cin.get();
    int main();
}

int mh (float min, float hour)
{
    min = (min / 60);
    hour = (hour + min);
    return hour;
}

int diftim ()
{
    //declares all of the variables used in this function
    unsigned int hours;
    unsigned int minutes;
    unsigned int h;
    unsigned int m;
    float tot1;
    float tot2;
    float tot3;
    string ap;
    string ap2;
    unsigned int h2;
    unsigned int m2;
    //gets input from the user
    cout<< "Hour: "<< endl;
    cin>> h;
    cout<< "Minute: "<< endl;
    cin>> m;
    cout<< "AM/PM?"<< endl;
    cin>> ap;
    cout<< "Second hour:  "<< endl;
    cin>> h2;
    cout<< "Second minute:  "<< endl;
    cin>> m2;
    cout<< "AM/PM?"<< endl;
    cin>> ap2;
    if (ap == "pm")
    {
        h = (h + 12);
    }
    if (ap2 == "pm")
    {
        h2 = (h2 + 12);
    }
    tot1 = mh (m, h);
    tot2 = mh (m2, h2);
    tot3 = (tot1 - tot2);
    hours = int(tot3);
    minutes = (60 * (tot3 - int(tot3)));
    cout<< hours<< " hours and "<< minutes<< " minutes."<< endl;
    cout<< "press enter to continue...";
    cin.get ();
    cin.get ();
    int main();
}

int main ()
{
    top:
    cout<< "                    MENU"<< endl;
    cout<< ""<< endl;
    cout<< " 1- Delayed Shutdown"<< endl;
    cout<< " 2- Find the difference between two times"<< endl;
    cout<< "_____________________________________________________________"<< endl;
    int strt;
    cin>> strt;
    //this gets and analyzes input from the user
    if (strt == 1)
    {
        int shutdn ();
        int main();
    }
    if (strt == 2)
    {
        int diftim ();
        int main();
    }
    else
    {
        int main();
    }
}


Im trying to use functions as different "functions". for example: one function executes cod that gets input for subtracting 2 time, another does math that's used multiple times throughout the prgram, etc. Unfortunatly, it doesnt seem to be calling the functions, just ending the program... Can someone help me with this?
Last edited on
IWishIKnew (1364)
so..... Anby help would be appreciated soooooo much! Thanks ahead of time.
Gaminic (1621)
Never call main(). NEVER call main() recursively.

Put the content of main() inside a while loop instead.
IWishIKnew (1364)
ok...
IWishIKnew (1364)
Here is my new code:

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#include <iostream>
#include <fstream>
#include <string>
using namespace std;

int ms (int minutes)
{
    int sec;
    sec = (minutes * 60);
    return sec;
}

int shutdn ()
{
    unsigned int sec;
    string c;
    unsigned int minutes;
    cout<< "Give then number of minutes until shutdown:  "<< endl; cin>> minutes;
    sec = ms (minutes);
    cout<< "Seconds until Shutdown: "<< sec<< endl;
    cout<< "Press enter to continue: ";
    cin.get();
    cin.get();
    return 0;
}

int mh (float min, float hour)
{
    min = (min / 60);
    hour = (hour + min);
    return hour;
}

int diftim ()
{
    //declares all of the variables used in this function
    unsigned int hours;
    unsigned int minutes;
    unsigned int h;
    unsigned int m;
    float tot1;
    float tot2;
    float tot3;
    string ap;
    string ap2;
    unsigned int h2;
    unsigned int m2;
    //gets input from the user
    cout<< "Hour: "<< endl;
    cin>> h;
    cout<< "Minute: "<< endl;
    cin>> m;
    cout<< "AM/PM?"<< endl;
    cin>> ap;
    cout<< "Second hour:  "<< endl;
    cin>> h2;
    cout<< "Second minute:  "<< endl;
    cin>> m2;
    cout<< "AM/PM?"<< endl;
    cin>> ap2;
    if (ap == "pm")
    {
        h = (h + 12);
    }
    if (ap2 == "pm")
    {
        h2 = (h2 + 12);
    }
    tot1 = mh (m, h);
    tot2 = mh (m2, h2);
    tot3 = (tot1 - tot2);
    hours = int(tot3);
    minutes = (60 * (tot3 - int(tot3)));
    cout<< hours<< " hours and "<< minutes<< " minutes."<< endl;
    cout<< "press enter to continue...";
    cin.get ();
    cin.get ();
    return 0;
}

int main ()
{
    unsigned int x;x = 0;
    while (x == 0)
    {
        cout<< "                    MENU"<< endl;
        cout<< ""<< endl;
        cout<< " 1- Delayed Shutdown"<< endl;
        cout<< " 2- Find the difference between two times"<< endl;
        cout<< "_____________________________________________________________"<< endl;
        unsigned int strt;
        cin>> strt;
        //this gets and analyzes input from the user
        if (strt == 1)
        {
            int shutdn ();
            x = 0;
        }
        if (strt == 2)
        {
            int diftim ();
            x = 0;
        }
    }
}


but instead of quitting, it just re-displays the menu... wtf. Whats wrong with it?
IWishIKnew (1364)
ummm...
Computergeek01 (5613)
After returning from your function calls in your main() function, you immediatly set 'x' to 0 so there is no chance for the while loop you started on Line 84 here to exit.
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