Your third miniquest - Etox

In a file called Etox.cpp, implement the following function:

double etox_5_terms(double x);

It should return the value of ex back to its caller. This value should be calculated as the sum of exactly the first five terms in its expansion below:

e^x =1+x+x² /2!+x³ /3!+... where n! is the factorial of n, which is the product of all positive integers at most equal to n. You would therefore return the result of the calculation:

1+x+x² /2!+x³ /3!+x⁴ /4! Keep it simple and don't overcode. No need to write a function for calculating factorials. Simply use numeric literals in their place.

In your main() function, prompt the user as follows:

Enter a value for x:

There must be one space after the colon and no newline. You must accept console input on the same line as the prompt.

Now read the user's response into a variable, calculate ex using the function you first defined, print the value on the console followed by a single newline.

#include  #include  

#include  // needed for sqrt #include  // for exit() 

using namespace std; 

double etox_5_terms(double x) { 

 // TODO - Your code here 

}

int main(int argc, char **argv) { string user_input; double x; 

 cout <<"Enter a value for x: "; getline(cin, user_input); istringstream(user_input) >>x; 

 // TODO - Your code here 

return 0;

}