Question

How to convert time in milliseconds to number of years in C++

Answer 1

#include <iostream>
#include <ctime>

int TimeInMillisecondsToNumberOfYears(long milliseconds) {
    // Get current time
    std::time_t t = milliseconds / 1000; // Convert milliseconds to seconds
    std::tm* cal = std::gmtime(&t);

    int totalyears = cal->tm_year + 1900 - 1970;
    
    int year = cal->tm_year + 1900;
    std::cout << year << std::endl;
    
    return totalyears;
}

int main() {
    long milliseconds = 1476907455894L;
    
    int totalyears = TimeInMillisecondsToNumberOfYears(milliseconds);
    std::cout << totalyears << std::endl;
}



/*
run:

2016
46

*/

 

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