C :

#include<stdio.h>
unsigned int ComputAge(unsigned int n);
main()
{
	unsigned int n=5;
	printf("%d\n",ComputAge(n));
}
unsigned int ComputAge(unsigned int n)
{
	unsigned int age;
	if(n==1)
	    age=10;
	else
	    age=ComputAge(n-1)+2;
	return age;
}

C++ :

#include<iostream>
#include<cstdio>
using namespace std;
int a[1001];
int main()
{
	a[1]=10;
	for(int i=2;i<=5;++i)
	a[i]=a[i-1]+2;
	cout<<a[5];
	return 0;
}