Plz tell me a program to implement following series

Question

e= (1÷0!) + (1÷1!) + (1÷2!).........+(1÷n!)
n = any positive number

Answer 1

double e =0;
for (int i = 0; i < n ; i++)
e+=1.0/fac (i);

i assume you have working function for faculty called fac. also you should write a main function and print out something to test your code.