Question

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

Answer 1

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

int TimeInMillisecondsToNumberOfYears(long milliseconds) {
    // Convert milliseconds to seconds
    time_t seconds = milliseconds / 1000;

    // Create a tm structure to hold the time
    struct tm *timeinfo = gmtime(&seconds);

    // Calculate the total years since 1970
    int totalyears = timeinfo->tm_year + 1900 - 1970;
    
    // Get the current year
    int year = timeinfo->tm_year + 1900;
    printf("%d\n", year);
    
    return totalyears;
}
    
int main() {
    long milliseconds = 1476907455894L;

    int totalyears = TimeInMillisecondsToNumberOfYears(milliseconds);
    
    printf("%d\n", totalyears);

    return 0;
}



/*
run:

2016
46

*/

 

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