C++ Date Problem, days of month, months from days

Original - c Code #include <stdio.h> unsigned int daysformonth(unsigned int month, unsigned int year) { /* This function returns the number of days for the given month in the given year */ return (30 + (((month & 9) == 8) || ((month & 9) == 1)) - (month == 2) - (!(((year % 4) == 0) && (((year % 100) != 0) || ((year % 400) == 0))) && (month == 2))); } int main() { /* declarations */ unsigned int numdays, month, year, maxdays; /* get input */ printf("Please give number of days:"); scanf("%u", &numdays); printf("Please give year:"); scanf("%u", &year); /* calculate result */ for(month = 1; numdays > (maxdays = daysformonth(month, year)); month = (month == 12) ? 1 : (month + 1)) { numdays -= maxdays; if(month == 12) year++; } /* output results */ printf("Day %u for month %u in year %u\n", numdays, month, year); /* return succes */ return 0; }

#include <stdio.h>
 
unsigned int daysformonth(unsigned int month, unsigned int year)
{
    /*  This function returns the number of days for the given month in the given year    */
    return (30 + (((month & 9) == 8) || ((month & 9) == 1)) - (month == 2) - (!(((year % 4) == 0) && (((year % 100) != 0) || ((year % 400) == 0))) && (month == 2)));
}
 
int main()
{
    /*  declarations  */
    unsigned int numdays, month, year, maxdays;
 
    /*  get input */
    printf("Please give number of days:");
    scanf("%u", &numdays);
    printf("Please give year:");
    scanf("%u", &year);
 
    /*  calculate result  */
    
    for(month = 1; numdays > (maxdays = daysformonth(month, year)); month = (month == 12) ? 1 : (month + 1))
    {
        numdays -= maxdays;
        if(month == 12)
            year++;
    }
 
    /*  output results    */
    printf("Day %u for month %u in year %u\n", numdays, month, year);
 
    /*  return succes */
    return 0;
}