Answer to Question #43137 in C++ for sanoop lal

Question

1 - u + u^3/2! - u^5/3! + ... + (-1)^(2n-1) u^(2n-1)/n!

Answer 1

#include <iostream>
#include <math.h>
#include <conio.h>
using namespace std;
int main(){
    int n;
    double u;
    cout<<"n = ";
    cin>>n;
    cout<<"u = ";
    cin>>u;
    double sum = 1.0;
    double value = u;
    for (int i = 1; i <= n; ){
        sum += pow(-1.0, (double)i)*value;
        value *= u*u/(++i);
    }    
    cout<<"answer = "<<sum<<endl;
    getch();
    return 0;