datatypes

Im writing a small sorting program (works so far) but for my next David Blaine stunt/magic trick, I would like it to accept decimal points. Like the typical ignorant newbie I tried to change my array from an int to float and I got quite a few invalid type errors.

Could someone with a lot of patience please break it down for me and simply explain what I need to convert it?

If you need to code, just ask.

Thnx!

If it is possible to get away with....simply make the array a float array. It will accept both int and float variables. Either way you're going to have to truncate the variables to be sorted. However, if you're truncating a float value to an integer value then your results will lose accuracy.

Why not display the code? It would be easier to help that way...

Here ya go

Code:

---

#include <iostream>

using std::cout;

using std::cin;

#include <stdlib.h>

void number_sort(int array[], int maxnum);



int main(void)
{
    // DECLARE VARIABLES
   
    int maxnum;  // This is how many numbers we will be using
   
    int ToBeSorted;  // Values which will eventually be in ascending order
   
    int Array[100]; // Declare Array with no more than 100 elements
   
   
       
    cout << "How many numbers do you want to sort? ";
   
    cin >> maxnum;
   
    cout << "\nPlease begin entering " << maxnum << " numbers.\n";
   
    ToBeSorted = 1;
   

        // GATHER DATA               
       
                for(ToBeSorted = 1; ToBeSorted < maxnum + 1; ToBeSorted++){ 

                    /*
                   
                        Use ToBeSorted as the array subscript and loop until we have all numbers needed (maxnum).
                       
                        "ToBeSorted" is set to 1 for the first number entered and since we increased ToBeSorted by
                       
                        one, the same must be done to "maxnum"
                       
                        */


                      cout << "\nEnter number " << ToBeSorted << "\n";
                     
                      cin >> Array[ToBeSorted];  // Initialize array with values
                     
                      cout << "\n";
                                         
              }
             
    // DISPLAY
   
        cout << "\n***BEFORE***\n";

                for(ToBeSorted = 1; ToBeSorted < maxnum + 1; ToBeSorted++){
               
                        cout << Array[ToBeSorted] << "\n";
                       
                }

        // SORTING

                number_sort(Array, maxnum);

        // DISPLAY
       
            cout << "\n****AFTER****\n";

                for(ToBeSorted = 1; ToBeSorted < maxnum + 1; ToBeSorted++){ 
               
                        cout << Array[ToBeSorted] << "\n";
                       
                }
               
                system("PAUSE");
                return 0;
               
}

void number_sort(int Array[], int maxnum)
{
   
    int ToBeSorted;  // Values which will eventually be in ascending order
   
    int Copied; // If value is < than ToBeSorted Value then copy value to Storage
   
    int Storage;  // This holds values temp until copy is complete
   

    for(ToBeSorted = 1; ToBeSorted < maxnum + 1; ToBeSorted++){  // Pass through each element in the array

        for(Copied = ToBeSorted+1; Copied < maxnum + 1; Copied++){  // Loop again and move values if needed

            if(Array[ToBeSorted] > Array[Copied]){  // if ToBeSorted(1) is greater than Copied(2) then do next 3 lines
                               
                                        Storage = Array[ToBeSorted];  // Move ToBeSorted into temp Storage
                                       
                                        Array[ToBeSorted] = Array[Copied]; // Move the smaller number from Copied to the ToBeSorted array
                                       
                                        Array[Copied] = Storage; // Now copy the original value we got from ToBeStored (now in Storage) to the Copied array
            }
        }
    } 
}

---

Use a double.
Floats need to be prefixed with an 'f' when declared, although if you don't, some compilers just convert it to double.

Ok I changed the ints to double except for maxnum which will always be a whole number. All others which could possibly have a decimal was changed to double. Now Im getting errors similar to when I tried float, which are:

invalid types `double[100][double]' for array subscript
invalid types `double *[double]' for array subscript

any suggestions are appreciated. :confused:
Thanks again!

Here we go :)
hints :

• I changed the variable ToBeStored into the variable counter
• ur program didnt work coz u tried to do this : Array[ToBeStored]---->while ToBeStored is double
• I prefered to initilze counter to 0 as array sort begin through 0,1,2,,..... 9this wasnt neccessary
• this program accept decimals and int and compined list of noumbers

hope it ll help u :)

Code:

---


#include <iostream>

using std::cout;

using std::cin;

#include <stdlib.h>

void number_sort(double array[], int maxnum);



int main(void)
{
    // DECLARE VARIABLES
   
    int maxnum;  // This is how many numbers we will be using
   
    double ToBeSorted;  // Values which will eventually be in ascending order
   
    double Array[100]; // Declare Array with no more than 100 elements
   
   
       
    cout << "How many numbers do you want to sort? ";
   
    cin >> maxnum;
   
    cout << "\nPlease begin entering " << maxnum << " numbers.\n";
   
    //ToBeSorted = 1;    useless line !!!!!
   

        // GATHER DATA               
       
                for(int counter = 0; counter < maxnum ; counter++){

                    /*
                   
                        Use ToBeSorted as the array subscript and loop until we have all numbers needed (maxnum).
                       
                        "ToBeSorted" is set to 1 for the first number entered and since we increased ToBeSorted by
                       
                        one, the same must be done to "maxnum"
                       
                        */


                      cout << "\nEnter number " <<(counter+1) << "\n";
                     
                      cin >> Array[counter];  // Initialize array with values
                     
                      cout << "\n";
                                         
              }
             
    // DISPLAY
   
        cout << "\n***BEFORE***\n";

                for(int counter = 0; counter < maxnum ; counter++){
               
                        cout << Array[counter] << "\n";
                       
                }

        // SORTING

                number_sort(Array, maxnum);

        // DISPLAY
       
            cout << "\n****AFTER****\n";

                for(int counter = 0; counter < maxnum ; counter++){
               
                        cout << Array[counter] << "\n";
                       
                }
               
                system("PAUSE");
                return 0;
               
}

void number_sort(double Array[], int maxnum)
{
   
    double ToBeSorted;  // Values which will eventually be in ascending order
   
    int Copied; // If value is < than ToBeSorted Value then copy value to Storage
   
    double Storage;  // This holds values temp until copy is complete
   

    for(int counter = 0; counter < maxnum; counter++){  // Pass through each element in the array

        for(Copied = counter+1; Copied < maxnum ; Copied++){  // Loop again and move values if needed

            if(Array[counter] > Array[Copied]){  // if ToBeSorted(1) is greater than Copied(2) then do next 3 lines
                               
                                        Storage = Array[counter];  // Move ToBeSorted into temp Storage
                                       
                                        Array[counter] = Array[Copied]; // Move the smaller number from Copied to the ToBeSorted array
                                       
                                        Array[Copied] = Storage; // Now copy the original value we got from ToBeStored (now in Storage) to the Copied array
            }
        }
    } 
}

---

Uh, sorry, I didn't read your code, just looked at the question. Array subscripts have to be integral values, i.e. an int. I believe char could be used as well, but have never seen that in C++, only Delphi. But you wouldn't use a float for a subscript, either.

hey, thanks for helping me out.. I dont fully understand everything thats happening yet but thats how I learn. Now its time for me to pull it apart, and figure it out for myself!

YDM!
Rye