Error Cs0165 Use Of Unassigned Local Variable
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Error 1 Use Of Unassigned Local Variable
Chinese Spanish Japanese Korean Portuguese Ask a question Spaces Default Help Room META Moderators Topics Questions Users Badges Home / 1 Question by curv error 2 use of unassigned local variable c# · Jan 14, 2013 at 09:11 PM · c#array error CS0165: Use of unassigned local variable? Can anyone help me with this one? I have the two lines below, just two.. and I get the following error: error CS0165: use of unassigned local variable c# array Use of unassigned local variable 'pipesStart' I'm wracking my brains over this one, as this to me is correct. void Start () { float[] pipesStart; pipesStart[0] = 0.0f; } Comment Add comment 10 |3000 characters needed characters left characters exceeded 笆ｼ Viewable by all users Viewable by moderators Viewable by moderators and the original poster Advanced visibility Viewable by all users 1 Reply · Add your reply Sort: 2 Best Answer Answer by Piflik · Jan 14, 2013 at
Use Of Unassigned Local Variable C# String
09:13 PM You have declared an array, but never initialized it. What is stored in an array variable is actually just a pointer to a memory address, but you never allocated the memory you need for that aray. The vlue in your pipesStart variable is 'null', and you cannot do anything with 'null'. float[] pipesStart = new float[10]; //for an array with length ten...use whatever number you need...note: arrays cannot be resized Comment Add comment · Show 2 · Share 10 |3000 characters needed characters left characters exceeded 笆ｼ Viewable by all users Viewable by moderators Viewable by moderators and the original poster Advanced visibility Viewable by all users curv · Jan 14, 2013 at 09:16 PM 0 Share ah.. But I'm not sure how large this array will be. Does it need to become an ArrayList at this point? Piflik · Jan 14, 2013 at 09:38 PM 0 Share If you don't know how long the array has to be, it would really be better to use a list. using System.Collection.Generic; List
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Use Of Unassigned Local Variable Datetime C#
Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, http://answers.unity3d.com/questions/380567/error-cs0165-use-of-unassigned-local-variable.html helping each other. Join them; it only takes a minute: Sign up C# error CS0165: Use of unassigned local variable - ignoring logic and out reference up vote 2 down vote favorite After searching around I cant seem to locate why the C# compiler is complaining that the local variable dteDest is unassigned in the line if (dteSrc http://stackoverflow.com/questions/7900635/c-sharp-error-cs0165-use-of-unassigned-local-variable-ignoring-logic-and-out == dteDest) { The error goes away if I replace the line DateTime dteSrc, dteDest; with DateTime dteSrc, dteDest = DateTime.MinValue; As far as I can see the code will never reach the comparison line if dteDest is not initialised by the DateTime.TryParse which it is an out parameter for. My logic is: If currentDataObj is null then booHaveOrigDate is false and the first if fails If currentDataObj is not null but cant be converted to a DateTime then booHaveOrigDate is false and the first if fails DateTime.TryParse will return false if it cant convert to a DateTime this along with the && means that dteDest will never be used. Simple Sample Code void StrangeLogic(object srcData, object currentDataObj) { DateTime dteSrc, dteDest; bool booHaveNewDate = DateTime.TryParse(srcData.ToString(), out dteSrc); bool booHaveOrigDate = (currentDataObj != null) && DateTime.TryParse(currentDataObj.ToString(), out dteDest); if (booHaveNewDate && booHaveOrigDate) { if (dteSrc == dteDest) { // Get a "use of unassignned local variable 'dteDest' // unless dteDest = DateTime.MinValue beforehand } } } Also if I change
Sign in Pricing Blog Support Search GitHub This repository Watch 890 Star 6,343 Fork 1,521 dotnet/roslyn Code Issues 3,203 Pull requests 131 https://github.com/dotnet/roslyn/issues/4272 Projects 0 Wiki Pulse Graphs New issue "Use of unassigned local variable" CS0165 issue #4272 Closed mpmel opened this Issue Jul 31, 2015 · 6 comments Projects None yet http://round.main.jp/iapp/old/pages/csharp.htm Labels Area-Compilers Resolution-By Design Milestone No milestone Assignees No one assigned 5 participants mpmel commented Jul 31, 2015 I'm getting a complaint in my code using use of VS 2015 and .Net 4.5.2, and am not quite understanding why. If I call MyObject o; if (objects != null && objects.TryGetValue(objectName, out o)) v.Property= o; then everything is fine. The following two cases however give me an error, and I'm not quite understanding why. MyObject o; if (objects != null ? objects.TryGetValue(objectName, out o) : false) v.Property= use of unassigned o; // <-- error CS0165: Use of Unassigned local variable 'o' and MyObject o; bool b; if (objects != null) b = objects.TryGetValue(objectName, out o); else b = false; if (b) v.Property = o; // <-- error CS0165: Use of Unassigned local variable 'o' In either of the last 2 cases, I don't see how o can be used unless TryGetValue is called, which means o should be initialized. Is this a bug? Or I am I missing something? Pilchie added the Area-Compilers label Jul 31, 2015 paul1956 commented Jul 31, 2015 All the VB examples show an explicate initialization of "o", even though the documentation call value an out or
MonoBehaviour { //この部分にユーザがスクリプトを記述していく } 【Inspecterビュー上とリンクする変数の作成】 変数をpublic宣言するとインスペクタから変更や設定が出来るようになる public Vector3 angle; //３次元ベクトル形式の変数、angleをpublic宣言して準備 【代表的なオーバーライド関数】void Start(){} Start() スクリプト起動時に一度実行。Updateの前。 Update() 毎フレーム実行。 LateUpdate() 全てのUpdateの実行後に実行。カメラ制御などに使用。 Awake() スクリプト起動直後に実行。初期化処理を行う。 OnGUI() ボタンやテキストなどのGUIを画面に描画する処理記述。 OnMouseDown() 自分自身がくりっくされたとき。 【コンポーネントへのアクセス】 transform Transformコンポーネントへ （座標、回転角度、スケールなど） へアクセス gameObject このスクリプト自体の親ゲームオブジェクトへのアクセス collider Collider (衝突判定) へアクセス rigidbody Rigidbody (物理挙動の制御) へアクセス 【一般変数の型】 byte 8bit 0〜255 short 16bit -32768〜32767 int 32bit -2147483648〜2147483647 long 64bit -9223372036854775808〜9223372036854775807 sbyte 8bit -128〜127 ushort 16bit 0〜65535 uint 32bit 0〜4294967295 ulong 64bit 0〜18446744073709551615 float 32bit 数値の後ろにfを付けて表す double 64bit 数値の後ろにdを付けて表す decimal 128bit 数値の後ろにmを付けて表す string 文字列変数 【文字列操作】 string a = "文字列A"; string b = "文字列B"; string c; c = a + b; //文字列同士を足す int le; le = a.Length; string a = "文字列A"; string b; b = a.Substring(「開始位置」,「取り出す文字数」); b = a.Substring(0, 2); //先頭から2文字→文字 b = a.Substring(1, 2); //2文字目から3文字→字列 b = a.Substring(1); //3文字目以降全部→字列A string a = "文字列A\n文字列B"; string[] b; string c; b = a.Split("\n"[0]); //改行コードで分割 c = b[0]; //cには『文字列A』が入る string a = "文字列A\n文字列B"; string[] b; string c; string[] KUGIRI = {"\r", "\n"}; //データの区切