Thread: problems with time

Your code

Code:

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


int main()
{
	time_t now;
	time_t timeGrad;
	struct tm *timeinfo;
	struct tm *grad;

	/* current time */
	time(&now);
	timeinfo = localtime(&now);

	/* graduation time  */
	time(&timeGrad);
	grad = localtime(&timeGrad);

	grad->tm_sec = 0;
	grad->tm_min = 0;
	grad->tm_hour = 0;
	grad->tm_mday = 24;
	grad->tm_mon = 4;
	grad->tm_year = 113;
//	printf("Grad date is %d-%d-%d\n", grad->tm_mon+1, grad->tm_mday, grad->tm_year+1900);


	/*print out unformatted*/
	printf("The current time is %s", ctime(&now));

	/*Format and print time, mm-dd-yyyy*/
	printf("The date is %d-%d-%d\n", timeinfo->tm_mon+1, timeinfo->tm_mday, timeinfo->tm_year+1900);
	printf("Grad date is %d-%d-%d\n", grad->tm_mon+1, grad->tm_mday, grad->tm_year+1900);



	return 0;

}

localtime() returns a pointer to some hidden local storage. So as you modify it, everything that points to it ALSO changes.

If you want to make unique copies, do this
struct tm timeinfo = *localtime(&now);