Working with variables Strings in C# using function ".insert(int startIndex, string value)"

Question

I'm trying to write an app to convert different number systems. In the code below I check if the rest is "0" or "1". If it is the program should add "0" or "1" to my result string binaer. It don't work and I have really no idea why.

public void dezinbin(int dez) {
    var binaer = "";        // erstellt den leeren Ausgabestrang
    var platzhalter = dez;                  //Platzhalter für dez, da des nicht verändert werden kann

    for (var i = 0; i<16; i++){
        var binarrest = platzhalter % 2;  //teilt dez durch 2 und speichert den rest in binaerrest
        platzhalter = platzhalter / 2;          //verringert die dez-Eingabe um die hälfte
        if (binarrest == 0) //hängt den binaerrest jeweils an den Anfang des Ausgabestrings
        {
            binaer.Insert(0, "0");
        }
        else 
        {
            binaer.Insert(0, "1");
        }
                    }
    this.bin = binaer;   //gibt den Ausgabestring zurück
}

Please define "doesn't work". Does it crash? Do you get an error? Does it run but give the wrong result? — Jason, Sep 08 '16 at 15:23
further, C# has built in functions to handle this conversion: http://stackoverflow.com/questions/2954962/decimal-to-binary-conversion-in-c — Jason, Sep 08 '16 at 15:24

score 1 · Answer 1 · answered Sep 08 '16 at 15:27

1

Am I right to understand you want to append "0" or "1" to the string binaer?

if you want to append to the end try

    binaer +=  "1"

if you want to put it in front , then try

    binaer = "1" + binaer;

answered Sep 08 '16 at 15:27

anil

598
1
6
20

score 1 · Accepted Answer · answered Sep 08 '16 at 15:28

1

please use this syntax:

binaer = binaer.Insert(0, "0");

because insert has not changed the "binaer" itself.

answered Sep 08 '16 at 15:28

henry

41
2

perfect, that was the mistake. Thank u very much – Fabian Sep 08 '16 at 15:58

score 0 · Answer 3 · answered Sep 08 '16 at 15:31

0

try using binaer += "0"; instead of binaer.Insert(0, "0");

and so on and so forth.

answered Sep 08 '16 at 15:31

Farhan Ahmed

342
1
8

Working with variables Strings in C# using function ".insert(int startIndex, string value)"

3 Answers3