1969 return for localtime_s in C++

[ProfoundDisputes]

Well I have been researching why I keep getting the epoch time instead of the current time:

#include <iostream>
#include <ctime>

using namespace std;

int main()
{
	time_t t = 0;
	tm time;
	char buffer[26];
	errno_t err;

	err = localtime_s(&time, &t);

	if (err)
	{
		cout << "ERROR" << endl;
		cin.get();
		return 0;
	}
	cout << "This is the time:" << endl;
	cout << time.tm_mon << "/" << time.tm_mday << "/" << time.tm_year + 1900 << endl;
	cout << "Hour: " << time.tm_hour << endl << "Min: " << time.tm_min << endl;

	err = asctime_s(buffer, 26, &time);

	cout << endl << "Now with asc conversion: " << endl;
	cout << "This is the time:" << endl << buffer;
	cin.get();
	return 0;
}

 

Its not throwing an error or anything but when I run this program I get:

Quote

This is the time:
11/31/1969
Hour: 19
Min: 0 

Now with asc conversion:
This is the time:
Wed Dec 31 19:00:00 1969

EDIT: I realized that localtime_s is a conversion from a time point to a tm structure. I thought it returns the current time. I have to first set time_t t to the current time point.

I set it to 0 because it was causing errors by being null.

[Mr_KoKa]

localtime function converts timestamp into calendar time. The second param is time to convert (your t variable) and since your is 0 then it is 0 (which is 1970 + timezone).

try:

    time_t t = time(NULL);

 

[ProfoundDisputes]

3 minutes ago, Mr_KoKa said:

localtime function converts timestamp into calendar time. The second param is time to convert (your t variable) and since your is 0 then it is 0 (which is 1970 + timezone).

try:

    time_t t = time(NULL);

 

Yes, I realized that 10min after posting. I already edited to show that I realized that.

[ProfoundDisputes]

Just now, ProfoundDisputes said:

Yes, I realized that 10min after posting. I already edited to show that I realized that.

Which is annoying because I have been trying to figure it out for 2+ hours...

[Mr_KoKa]

I was too excited to help so I hadn't noticed your edit : D

[ProfoundDisputes]

6 minutes ago, Mr_KoKa said:

localtime function converts timestamp into calendar time. The second param is time to convert (your t variable) and since your is 0 then it is 0 (which is 1970 + timezone).

try:

    time_t t = time(NULL);

 

Thanks for telling me how to get the current time with time(NULL). I was getting nowhere looking online for some reason. I was in the middle of trying to use:

 

std::chrono::system_clock::now()

Which I couldn't figure out what it returned.

[Mr_KoKa]

2 minutes ago, ProfoundDisputes said:

Thanks for telling me how to get the current time with time(NULL). I was getting nowhere looking online for some reason. I was in the middle of trying to use:

Read reference more carefully : ) It is all there.

[ProfoundDisputes]

2 minutes ago, Mr_KoKa said:

Read reference more carefully : ) It is all there.

I am a noob when reading programming documentation. I am learning, though haha. Everything looks ambiguous at this point.