Thread: sorting values in array issue

so i tried sorting arr2 from lowest to highest value, but it only gives me 4 values and then the rest are zero. Any thoughts on how to fix this?

Code:

#include <iostream> 
#include <iomanip>
using namespace std;
int main()
{
   cout << fixed << setprecision(1);
   float userMin;
   float userMax;
   const int SIZE = 21;
   float arr[SIZE];
   const int SIZE2 = 21;
   float arr2[SIZE2];
   int count = 0;
   cout << "enter min ";
   cin >> userMin;
   cout << "enter max ";
   cin >> userMax;
   float inc = (userMax - userMin) / (SIZE-1);
   float x = inc*count + userMin;
   for (; x <= userMax;)
   {
      for (int e = 0; e < SIZE; e++)
      {
         arr[e] = x;
         arr2[e] = (0.0572*cos(4.667*x) + 0.0218*cos(12.22*x));
         cout << setw(15) << setprecision(1)<< arr[e]
            << setw(15) << setprecision(3) << arr2[e]
            << endl;
         count++;
         x = userMin + inc*count;
      }
   }
   int temp;
      for (int e = 0; e < SIZE-1; e++)
      {
         for (int j = e+1; j < SIZE; j++)
         {
            if (arr2[e] > arr2[j])
            {
               temp = arr2[e];
               arr2[e] = arr2[j];
               arr2[j] = temp;
            }
         }
      }
      for (int e = 0; e < SIZE; e++)
      {
         cout << "sorted: " << arr2[e] << endl;
      }
   return 0;
}

Yeh, you have some truncaiton-to-integer issues here:

Code:

 int temp;
      for (int e = 0; e < SIZE-1; e++)
      {
         for (int j = e+1; j < SIZE; j++)
         {
            if (arr2[e] > arr2[j])
            {
               temp = arr2[e];
               arr2[e] = arr2[j];
               arr2[j] = temp;
            }
         }
      }

Whenever you assign a float to the integer temp, the sub-zero part is thrown away, which will obviously leave you with 0 for smal numbers.

IF you use a float fior temp you'll be fine.