centuryFromYear

Given a year, return the century it is in. The first century spans from year 1 up to and including the year 100, the second - from the year 101 up to and including the year 200, etc.

Solution :

int centuryFromYear(int year)
{
    int a = year / 100;
    a++;
    if(year % 100 == 0)
       a--;
    return a;
}