Write a C++ program that asks the user for two positive integer values, M and N.

Question

Write a C++ program that asks the user for two positive integer values, M and N. The program should use a loop to get the sum of all integers from M up to N (inclusive). Input validation is necessary to guarantee that M is less than or equal to N.

Modify the above looping construct to also calculate sum of all odd integers and even integers from M up to N (inclusive). e.g. If user enters M = 4 and N = 10 The loop will find the sum of 4,5,6,….,9,10 & the sum of Odd Numbers: 5,7,9 & the sum of Even Numbers: 4,6,8,10

Display the following:

M = ____ N = ____

Sum of numbers between M and N = _____

Sum of even numbers = ______

Sum of odd numbers = ______

Explanation / Answer

#include <iostream>
#include <string>

using namespace std;

int main() {

int m,n, sum = 0,sumeven=0,sumodd=0;
cout << "Enter a positive integer M value: ";
cin >> m;
cout << "Enter a positive integer N value: ";
cin >> n;
for (int i = m; i <= n; ++i) {
sum += i;
if(i%2==0)
sumeven+=i;
else
sumodd+=i;
}
cout<<"M= "<<m<<" "<<"N= "<<n<<endl;
cout << "Sum of numbers between M and N = " << sum<<endl;
cout<<"Sum of even numbers ="<<sumeven<<endl;
cout<<"Sum of odd numbers = "<<sumodd<<endl;
return 0;
}

Enter a positive integer M value: 3

Enter a positive integer N value: 12

M= 3 N= 12

Sum of numbers between M and N = 75

Sum of even numbers =40

Sum of odd numbers = 35

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