C++ Programme to sum the sequence x -(x^2/2!) + (x^4/4!) -(x^6/6!) + .......

#include<iostream.h>

#include<conio.h>

#include<math.h>

int main()

{

                int x,p,i,j;

                double fact=1.0,ans=0;

                cout<<"Enter the value of x:";

                cin>>x;

                cout<<"Enter till what power you want:";

                cin>>p;

                ans=x;

                for(i=2,j=1;i<=p;i++,j++){

                                fact=fact*i;

                                if(i%2==0)

                                                ans+=(pow(-1,j))*((pow(x,i))/(fact));

                }

                cout<<"The sum of the series is:"<<ans;

                return 0;

}

OUTPUT:

Enter the value of x:3

Enter till what power you want:4                                                

The sum of the series is:-4.875