This lab is a basic application of the for loop.

Copy the code below into your compiler

Why is the typecast operator needed to compute the mean in the statement mean = static_cast(float)(total)/value;? What do you think will happen if it is removed? Modify the code and try it. Record what happens. Make sure that you try both even and odd cases. Now put static_cast total back in the program..

What happens if you enter a float such as 2.99 instead of an integer for value? Try it and record the results.

Modify the code so that it computes the mean of the consecutive positive integers n, n+1, n+2, . . . , m, where the user chooses n and m. For example, if the user picks 3 and 9, then the program should find the mean of 3, 4, 5, 6, 7, 8, and 9, which is 6.

Submit the revised LastFirst_lab53.cpp

The following is the code to be used:

// This program has the user input a number n and then finds the

// mean of the first n positive integers

// PLACE YOUR NAME HERE

#include

using namespace std;

int main()

{

int value; // value is some positive number n

int total = 0; // total holds the sum of the first n positive numbers

int number; // the amount of numbers

float mean; // the average of the first n positive numbers

cout << "Please enter a positive integer" << endl;

cin >> value;

if (value > 0)

{

for (number = 1; number <= value; number++)

{

total = total + number;

} // curly braces are optional since there is only one statement

mean = float(total) / value; // note the use of the typecast // operator here

cout << "The mean average of the first " << value << " positive integers is " << mean << endl;

}

else

cout << "Invalid input - integer must be positive" << endl;

return 0;

}