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recursion_2.cpp
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recursion_2.cpp
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#include<iostream>
using namespace std;
int sumNatural(int);
int sumOddNatural(int);
int sumEvenNatural(int);
int sumSquares(int);
int factorial(int);
int sumDigits(int);
void DecimalToBinary(int);
void DecimalToOctal(int);
int Fibonacci(int);
int hcf(int,int);
double power(double,double);
int hcf(int a,int b)
{
if(a>b)
{
if(a%b==0)
return b;
return hcf(a%b,b);
}
else
{
if(b%a==0)
return a;
return hcf(a,b%a);
}
}
double power(double x,double y)
{
if(y==0)
return 1;
if(y>0)
return x*power(x,y-1);
else
return 1/x*power(x,y+1);
}
int Fibonacci(int n)
{
if(n==0 || n==1)
return 0;
else if(n==2)
return 1;
return Fibonacci(n-1) + Fibonacci(n-2);
}
void DecimalToOctal(int n)
{
if(n>0)
{
DecimalToOctal(n/8);
cout<<n%8;
}
}
void DecimalToBinary(int n)
{
if(n>0)
{
DecimalToBinary(n/2);
cout<<n%2;
}
}
int sumDigits(int n)
{
if(n>=0 && n<=9)
return n;
return n%10+sumDigits(n/10);
}
int factorial(int n)
{
if(n==0)
return 1;
return n*factorial(n-1);
}
int sumSquares(int n)
{
if(n==1)
return 1;
return n*n+sumSquares(n-1);
}
int sumEvenNatural(int n)
{
if(n==1)
return 2;
return 2*n+sumEvenNatural(n-1);
}
int sumOddNatural(int n)
{
if(n==1)
return 1;
return 2*n-1 + sumOddNatural(n-1);
}
int sumNatural(int n)
{
if(n==1)
return 1;
return n+sumNatural(n-1);
}
int main()
{
double x;
double y;
cout<<"Enter two nos\n";
cin>>x>>y;
cout<<power(x,y);
cout<<endl;
return 0;
}