Given the current date and birth date, find the present age.
Examples:
Input : Birth date = 07/09/1996
Present date = 07/12/2017
Output : Present Age = Years: 21 Months: 3 Days: 0
t Age = Years: 7 Months: 11 Days: 21
While calculating the difference in two dates we need to just keep track of two conditions that will do.
- If the current date is less than that of the birth date, then that month is not counted, and for subtracting dates we add number of month days to the current date so as to get the difference in the dates.
- If the current month is less than the birth month, then the current year is not taken into count as this year has not been completed and for getting the difference of months, we subtract by adding 12 to the current month.
- At the end we just need to subtract the days, months and years to get the difference after the two conditions are dealt with.
Below is the implementation of the above approach is as follows:
C++
// c program for age calculator #include <stdio.h> #include <stdlib.h> // function to calculate current age void findAge(int current_date, int current_month, int current_year, int birth_date, int birth_month, int birth_year) { // days of every month int month[] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }; // if birth date is greater than current date // then do not count this month and add 30 // to the date so as to subtract the date and // get the remaining days if (birth_date > current_date) { current_date = current_date + month[birth_month - 1]; current_month = current_month - 1; } // if birth month exceeds current month, then do // not count this year and add 12 to the month so // that we can subtract and find out the difference if (birth_month > current_month) { current_year = current_year - 1; current_month = current_month + 12; } // calculate date, month, year int calculated_date = current_date - birth_date; int calculated_month = current_month - birth_month; int calculated_year = current_year - birth_year; // print the present age printf("Present Age\nYears: %d Months: %d Days:" " %d\n", calculated_year, calculated_month, calculated_date); } // driver code to check the above function int main() { // current dd// mm/yyyy int current_date = 7; int current_month = 12; int current_year = 2017; // birth dd// mm// yyyy int birth_date = 16; int birth_month = 12; int birth_year = 2009; // function call to print age findAge(current_date, current_month, current_year, birth_date, birth_month, birth_year); return 0; } |
Java
// Java program for age calculator import java.io.*; class GFG { static void findAge(int current_date, int current_month, int current_year, int birth_date, int birth_month, int birth_year) { int month[] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }; // if birth date is greater than current // date, then do not count this month // and add 30 to the date so as to subtract // the date and get the remaining days if (birth_date > current_date) { current_month = current_month - 1; current_date = current_date + month[birth_month - 1]; } // if birth month exceeds current month, // then do not count this year and add // 12 to the month so that we can subtract // and find out the difference if (birth_month > current_month) { current_year = current_year - 1; current_month = current_month + 12; } // calculate date, month, year int calculated_date = current_date - birth_date; int calculated_month = current_month - birth_month; int calculated_year = current_year - birth_year; // print the present age System.out.println("Present Age"); System.out.println("Years: " + calculated_year + " Months: " + calculated_month + " Days: " + calculated_date); } public static void main(String[] args) { // present date int current_date = 7; int current_month = 12; int current_year = 2017; // birth dd// mm// yyyy int birth_date = 16; int birth_month = 12; int birth_year = 2009; // function call to print age findAge(current_date, current_month, current_year, birth_date, birth_month, birth_year); } } |
Python
# Python program to calculate range def findAge(current_date, current_month, current_year, birth_date, birth_month, birth_year): # if birth date is greater than current date # then do not count this month and add 30 to the date so # as to subtract the date and get the remaining days month =[31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31] if (birth_date > current_date): current_month = current_month - 1 current_date = current_date + month[birth_month-1] # if birth month exceeds current month, then # donot count this year and add 12 to the # month so that we can subtract and find out # the difference if (birth_month > current_month): current_year = current_year - 1; current_month = current_month + 12; # calculate date, month, year calculated_date = current_date - birth_date; calculated_month = current_month - birth_month; calculated_year = current_year - birth_year; # print present age print"Present Age" print("Years:", calculated_year, "Months:", calculated_month, "Days:", calculated_date) # driver code current_date = 7current_month = 12current_year = 2017 # birth dd//mm//yyyy birth_date = 16birth_month = 12birth_year = 2009 findAge(current_date, current_month, current_year, birth_date, birth_month, birth_year) |
C#
// C# program for age calculator using System; class GFG { static void findAge(int current_date, int current_month, int current_year, int birth_date, int birth_month, int birth_year) { int []month = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }; // if birth date is greater than // current date, then do not // count this month and add 30 to the // date so as to subtract the date and // get the remaining days if (birth_date > current_date) { current_month = current_month - 1; current_date = current_date + month[birth_month - 1]; } // if birth month exceeds current month, // then do not count this year and add // 12 to the month so that we can // subtract and find out the difference if (birth_month > current_month) { current_year = current_year - 1; current_month = current_month + 12; } // calculate date, month, year int calculated_date = current_date - birth_date; int calculated_month = current_month - birth_month; int calculated_year = current_year - birth_year; // print the present age Console.WriteLine("Present Age"); Console.WriteLine("Years: " + calculated_year + " Months: " + calculated_month + " Days: " + calculated_date); } // driver code to check the above function public static void Main() { // present date int current_date = 7; int current_month = 12; int current_year = 2017; // birth dd// mm// yyyy int birth_date = 16; int birth_month = 12; int birth_year = 2009; // function call to print age findAge(current_date, current_month, current_year, birth_date, birth_month, birth_year); } } //This code is contributed by vt_m. |
PHP
<?php // PHP program for // age calculator // function to calculate // current age function findAge(int $current_date, int $current_month, int $current_year, int $birth_date, int $birth_month, int $birth_year) { // days of every month $month = array(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 ); // if birth date is greater // than current date // then do not count this // month and add 30 to the // date so as to subtract // the date and get the // remaining days if ($birth_date > $current_date) { $current_date = $current_date + $month[$birth_month - 1]; $current_month = $current_month - 1; } // if birth month exceeds // current month, then do // not count this year and // add 12 to the month so // that we can subtract and // find out the difference if ($birth_month > $current_month) { $current_year = $current_year - 1; $current_month = $current_month + 12; } // calculate date, month, year $calculated_date = $current_date - $birth_date; $calculated_month = $current_month - $birth_month; $calculated_year = $current_year - $birth_year; // print the present age echo "Present Age\nYears:",$calculated_year, " " , "Months:", $calculated_month, " ", "Days:", $calculated_date; } // Driver Code // current dd// mm/yyyy $current_date = 7; $current_month = 12; $current_year = 2017; // birth dd// mm// yyyy $birth_date = 16; $birth_month = 12; $birth_year = 2009; // function call to print age findAge($current_date, $current_month, $current_year, $birth_date, $birth_month, $birth_year); // This code is contributed by anuj_67. ?> |
Javascript
<script> // Javascript program for age calculator // function to calculate current age function findAge(current_date, current_month, current_year, birth_date, birth_month, birth_year) { // days of every month month = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 ] // if birth date is greater than current date // then do not count this month and add 30 // to the date so as to subtract the date and // get the remaining days if (birth_date > current_date) { current_date = current_date + month[birth_month - 1]; current_month = current_month - 1; } // if birth month exceeds current month, then do // not count this year and add 12 to the month so // that we can subtract and find out the difference if (birth_month > current_month) { current_year = current_year - 1; current_month = current_month + 12; } // calculate date, month, year var calculated_date = current_date - birth_date; var calculated_month = current_month - birth_month; var calculated_year = current_year - birth_year; // print the present age document.write("Present Age<br>Years: "+(calculated_year)+" "); document.write("Months: "+calculated_month+" "); document.write("Days: "+calculated_date+" "); } // driver code to check the above function // current dd// mm/yyyy var current_date = 7; var current_month = 12; var current_year = 2017; // birth dd// mm// yyyy var birth_date = 16; var birth_month = 12; var birth_year = 2009; // function call to print age findAge(current_date, current_month, current_year, birth_date, birth_month, birth_year); </script> |
Output
Present Age Years: 7 Months: 11 Days: 22
Time Complexity: O(1)
Auxiliary Space: O(1)
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