Question

need help!!

Bring in program for. cpp from the Lesson Set 5 source files folder. This program has the user input a number n and then finds the mean of the first n positive integers. a. Modify the code to change the following line mean ? stat,iccasL<float>(total) / value; with this one mean - total / value; b. Compile and run the program. Take a screen capture of the program running and paste in the document titled Lesson Set 5 Screen Captures. c. Change the code back to using static_cast to calculate the mean. d. Compile and run the program with the same input as in 5b. Take a screen capture of the program running and paste in the document titled Lesson Set 5 Screen Captures.

Answer 1

$\underline{original\;\;for.cpp}$

#include <iostream>

using namespace std;

int main(){
   int value;
   int total = 0;
   int number;
   float mean;
   cout << "Please enter a positive integer: " << endl;
   cin >> value;
   if(value > 0){
       for(number = 1; number <= value; number++){
           total = total + number;
       }
       mean = static_cast<float>(total) / value;
       cout << "the mean average of the first " << value;
       cout << " positive integers is " << mean << endl;
   }
   else{
       cout << "invalid input - integer must be positive" << endl;
   }
   return 0;
}

$\underline{Output:}$

C: Program Files (x86)\Dev-Cppl ConsolePauser.exe Please enter a positive integer: the mean average of the first 9 positive integers is 5 Process exit Press any key to continue - . - ed with return value

$\underline{Modified\;\;for.cpp}$

#include <iostream>

using namespace std;

int main(){
   int value;
   float total = 0;
   int number;
   float mean;
   cout << "Please enter a positive integer: " << endl;
   cin >> value;
   if(value > 0){
       for(number = 1; number <= value; number++){
           total = total + number;
       }
       mean = total / value;
       cout << "the mean average of the first " << value;
       cout << " positive integers is " << mean << endl;
   }
   else{
       cout << "invalid input - integer must be positive" << endl;
   }
   return 0;
}

$\underline{Output:}$

C: Program Files (x86)\Dev-Cppl ConsolePauser.exe Please enter a positive integer: the mean average of the first 9 positive integers is 5 Process exit Press any key to continue - . - ed with return value