Hello everyone. I am new to coding, taking an introductory C++ class at Baylor University. I am trying to get this standard deviation problem worked out, but I just pulled an all-nighter on it thinking it would be simple, but it is not.

I have attached the prompt for the assignment if you would care to take a look:

Assignment 1 - sum avg std dev.doc

As per the code I have developed, that can be viewed here:

/************************************************************************************************************************

Filename: Assignment 1.cpp

Author: Myles Daniel Baker

Class: CSI 1430 - 05

Description: This C++ Porgram will accept four integers from a

user, store them as variables, and prints the sum,

average, and standard deviation of the four integers.

Date Modified: 09/04/2008

- File Created

*************************************************************************************************************************/

# include <iostream>

# include <cmath>

# include <string>

using namespace std;

int main()

{

float integer1, whole1, integer2, whole2, integer3, whole3, integer4, whole4, avg, sum, s_dev;

```
cout << "Hello!" <<endl;
cout << endl << endl << endl;
cout << "Using C++ we are going to evaluate the sum, average, \n";
cout << "and standard diviation of a set of four integers. \n";
cout << endl;
cout << "Please input the 1st of 4 integers \n";
cin >> integer1;
cout << endl;
whole1 = integer1;
cout << "Integer1: " << whole1 << endl;
cout << endl;
cout << "Please input the 2nd of 4 integers \n";
cin >> integer2;
cout << endl;
whole2 = integer2;
cout << "Integer2: " << whole2 << endl;
cout << endl;
cout << "Please input the 3rd of 4 integers \n";
cin >> integer3;
cout << endl;
whole3 = integer3;
cout << "Integer3: " << whole3 << endl;
cout << endl;
cout << "Please input the 4th of 4 integers \n";
cin >> integer4;
cout << endl;
whole4 = integer4;
cout << "Integer4: " << whole4 << endl;
cout << endl;
sum = (whole1 + whole2 + whole3 + whole4);
cout << "The sum of the four integers equals: "<< sum;
cout << endl << endl;
avg = (sum / 4);
cout << "The average of these four integers equals: " << float(avg);
cout << endl << endl;
s_dev = sqrt(-((4*avg-whole1-whole2-whole3-whole4)/4);
cout << "The standard deviation of the four integers equals: " << s_dev <<endl;
cout << endl << endl << endl << endl;
cout <<"Thank you, have a nice day! \n";
cout << endl << endl;
return 0;
```

}

The professor allows us to test our programs before we submit them. He has given these values so you can compare them to yours if you run this through C++:

Int1: 23

Int2: 56

Int3: 5

Int4: 23

Sum: 107

Avg: 26.75

S_Dev: 18.417

I am wondering whether the equation he has supplied us with is correct. I am a mathematics major and cannot understand why this is so difficult for me. According to the models I have put together (the one above in addition to 5 other attempts or so) the equation should yield the correct results.

Please help!

Thanks