Problems.

[Wrycu]

Hello people.

I am pretty new to C++, but not very new to coding. I would like to have a C++ program do something at a certain date and time. I currently have the code:

#include <cstdlib>
#include <iostream>
 
using namespace std;
string timee;
 
int main()
{
    timee="Sun 09/03/2006";
    if (system("date /t")==timee)
    {
       cout<<"I win.\n";
    }
    cout<<timee;
    system("pause");
    return 0;
}
 

Im getting an error saying i cannot compare the two, or there is no room for operator== in that statement. I just need to get the time, and say... if its a certian time, do something. Can anyone help?

[Banfa]

Look up the function system, it does not return the output of the command run, it returns a int giving a success flag.

I suggest that you look up the time functions in C rather than trying to call out to the OS.

Look up functions

asctime - Convert time from type struct tm to character string.

clock - Return elapsed CPU time for process.

ctime - Convert time from type time_t to character string.

difftime - Compute difference between two times.

gmtime - Convert time from type time_t to struct tm

localtime - Convert time from type time_t to struct tm with local correction.

mktime - Convert time to calendar value.

strftime - Format date-and-time string for international use.

time - Get current system time as type time_t.

[Rakesh Mutharaju]

#include<time.h>
#include<stdio.h>
#include<conio.h>

void main()
{
long time1;
struct tm strtm;
clrscr();
time(&time1);
strtm = *localtime(&time1);
printf(" \n time %ld",time1);

printf(" \n time.tm_sec %d ",strtm.tm_sec);
printf(" \n time.tm_min %d",strtm.tm_min);
printf(" \n time.tm_hour %d",strtm.tm_hour);
printf(" \n time.tm_mday %d",strtm.tm_mday);
printf(" \n time.tm_mon %d",strtm.tm_mon);
printf(" \n time.tm_year %d", strtm.tm_year);
printf(" \n time.tm_wday %d",strtm.tm_wday);
getch();
}


output:

time 1157402802
time.tm_sec 42
time.tm_min 46
time.tm_hour 16
time.tm_mday 4
time.tm_mon 8
time.tm_year 106
time.tm_wday 1

This code will get the current system local time and print the details..as shown above

so for ur verification..

compare the details accordingly.. and do the rest.

struct tm... variables..
int tm_sec; seconds after the minute
int tm_min; minutes after the hour
int tm_hour; hours since midnight
int tm_mday; day of the month
int tm_mon; months since January
int tm_year; years since 1900
int tm_wday; days since Sunday
int tm_yday; days since January 1
int tm_isdst; Daylight Saving Time flag

[Wrycu]

Sweet, thanks.