Thread: How many loops?

This isn't homework, I'm working through the Malik book on my own.

Am I supposed to use one big loop for this whole task, or a seperate loop for each sub-task?

Code:

//******************************************************************************
// Malik Chapter 5 programming exercise 8
// Pretty stinkin' involved!
// 'Write a program that uses a while loop to perform the following steps:
//******************************************************************************

#include<iostrea>
using namespace std;

int main()
{
    //a. Prompt the user to input two integers (smaller one first)
    int firstNum, secondNum;
    
    //b. Output all odd numbers between firstNum and secondNum.
    
    //c. Output the sum of all even numbers between firstNum and secondNum.
    
    //d. Output the number and their square between 1 and 10.
    
    //e. Output the sum of the square of odd numbers between firstNum and secondNum.
    
    //f. Output all uppercase letters.

Thanks Noir

I couldn't figure out how to use a loop for step a but the rest was easy enough.
This would make more sense using functions but that's the next chapter.

Code:

#include<iostream>
using namespace std;

int main()
{

    //a. Prompt the user to input two integers (smaller one first)
    int firstNum, secondNum;
    cout<<"Please enter two integers, smaller one first: ";
    cin>>firstNum>>secondNum;
    cout<<endl;
    

    //b. Output all odd numbers between firstNum and secondNum.
    int x = firstNum;
    while(x <= secondNum)
    {if(x%2)
     cout<<x<<" ";
     x++;}
     cout<<endl<<endl;
    
    //c. Output the sum of all even numbers between firstNum and secondNum.
    int y = firstNum;
    int sum = 0;
    while(y <= secondNum)
    { if(!(y%2))
      sum = sum + y;
       y++;}
    cout<<"Sum of even numbers between "<<firstNum<<" and "<<secondNum
        <<" is "<<sum<<"."<<endl<<endl;
    
    //d. Output the numbers and their square between 1 and 10.
    int z = 1;
    while(z <= 10)
     {cout<<z<<" squared = "<<z*z<<endl<<endl;
     z++;}
    
    //e. Output the sum of the square of odd numbers between firstNum and secondNum.
      int a = firstNum;
      int sqr = 0;
      sum = 0;
    while(a <= secondNum)
    {if(a%2)
     {sqr = a * a;
     sum = sum + sqr;}
     a++;}
     cout<<"The sum of the square of odd numbers between your numbers is "
         <<sum<<"."<<endl<<endl;
       
    //f. Output all uppercase letters.
    char letter = 'A';
    while(letter <= 'Z')
    {cout<<letter; letter++;}
    
    cin.ignore();
    cin.get();
    return 0;
}

I agree, error handling of input is important but I wasn't sure how to do it.

The loop you suggest keeps displaying

Please enter two integers, smaller one first:

no matter what the input is.

I don't understand some of your code so I don't know why it doesn't terminate.