C++ little question


 
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# 8  
Old 03-09-2011
If you want to print all the numbers between the first and second including the first and second the following will work
Code:
#include <iostream>

int main()
{
   int i, j;

   std::cout << "Enter two numbers: " << std::endl;
   std::cin >> i >> j;
   std::cout << "You entered: " << i << " and " << j << "!" << std::endl;

   if (i==j)
      std::cout << "They are equal" << std::endl;
   else {
      for (; i <= j; i++) {
         std::cout << i << std::endl;
      }
   }

   return 0;
}

If you want to print all the numbers but exclude the first and second:
Code:
#include <iostream>

int main()
{
   int i, j;

   std::cout << "Enter two numbers: " << std::endl;
   std::cin >> i >> j;
   std::cout << "You entered: " << i << " and " << j << "!" << std::endl;

   if (i==j)
      std::cout << "They are equal" << std::endl;
   else {
      for (++i; i < j; i++) {
         std::cout << i << std::endl;
      }
   }

   return 0;
}

If you want to handle the case where the first number inputted is greater than the second number:
Code:
#include <iostream>

int main()
{
   int i, j;

   std::cout << "Enter two numbers: " << std::endl;
   std::cin >> i >> j;
   std::cout << "You entered: " << i << " and " << j << "!" << std::endl;

   if (i==j)
      std::cout << "They are equal" << std::endl;
   else {
      if (i > j) {
        int t = i;
        i = j;
        j = t;
      }
      for (++i; i < j; i++) {
         std::cout << i << std::endl;
      }
   }

   return 0;
}

This User Gave Thanks to fpmurphy For This Post:
# 9  
Old 03-10-2011
You are using a conditional if() statement and not a loop, some changes and it works

Code:
 
#include <iostream.h>
int main()
{
  int i, j;
  cout << "Enter two numbers:" << endl;
  cin >> i >> j;
  cout << "You etered: " << i << " and " << j << "!" << endl;
  
  if (i==j)
    cout << "They are equal" << endl;
  else
  {
    if (i<j)
     {
      while(i < j)
       {
       cout << i << endl;
       ++i;
       }
     }
    else if (i>j) {
     while(i > j)
      {
      cout << j << endl;
      j++;
      }
    }
  }
  return 0;

This User Gave Thanks to zius_oram For This Post:
# 10  
Old 03-10-2011
Thank you so much.
I am happy I am here in this forum!

---------- Post updated at 03:51 AM ---------- Previous update was at 03:46 AM ----------

fpmurphy

What does this for statement mean:
Code:
for (++i; i < j; i++)

?
# 11  
Old 03-10-2011
Quote:
Originally Posted by faizlo

What does this for statement mean:
Code:
for (++i; i < j; i++)

?

a loop to iterate through user given range excluding first (++i) element and last element (i < j).
This User Gave Thanks to zius_oram For This Post:
# 12  
Old 03-10-2011
++i is a so clever idea, then!

Thank you so much all again.
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