Error C2106 Visual Studio
Contents |
Languages , Windows Desktop Development > C++ Standards,
Left Operand Must Be L-value In C
Extensions, and Interop Question 0 Sign in to vote  Hi All,   Â
Left Operand Must Be L Value Struct
Here is my code. class Bucket      {      public:          Bucket() {count=0; label=-1; };      public: float label, count;               void displayData();              float getLabel();      };Â
C++ Must Be A Modifiable Lvalue
const int MAX=2000; Bucket ang[MAX];  ifstream inlabel("Labels of Buckets.txt");   k=0;float labelset;while(inlabel >> labelset && k<1023){ ang[k].getLabel() = labelset; cout << ang[k].getLabel() << endl; k++;} inlabel.close();    float Bucket::getLabel()  {      return label;  }   Why it shows"error C2106: '=' : left operand must be l-value"?? must be lvalue javascript I don't really understand what it means, sicne my label is defined as a float already.   Thanks a lot! Thank you for replying! I love this forum! Edited by RayTCo Saturday, August 09, 2008 12:05 AM typo Saturday, August 09, 2008 12:01 AM Reply | Quote Answers 0 Sign in to vote The easy fix is to have getLabel return a float& instead of a float, but then the name getLabel is a misnomer. So a better option would be to have separate member functions for getting and setting label:class Bucket { public:   Bucket() : label_(-1.0f), count_(0.0f) { }   float getLabel() const { return label_; }   void setLabel(float l) { label_ = l; } private:   float label_;   float count_; }; This is common enough that it is normal to elide the 'get' and 'set' part of the names, and distinguish between the methods only by their parameters and return types:class Bucket { public:   Bucket() : label_(-1.0f), count_(0.0f) { }   float label() const { return label_; }   void label(float l) { label_ = l; } private:   float label_;Â
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more expression must be a modifiable lvalue about Stack Overflow the company Business Learn more about hiring developers or posting visual studio 2016 ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack strcpy c Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up C++ error C2106: '=' : left operand must be l-value up https://social.msdn.microsoft.com/Forums/vstudio/en-US/ebea0a6f-ae8e-41fc-a757-2e2575c023a2/error-c2106-left-operand-must-be-lvalue?forum=vclanguage vote -3 down vote favorite Okay, so, ignoring my lazy coding (this is just to get the program to work, I'll clean it up after I get it working). I've set up a couple of if statements that will throw exceptions if I don't get the input I'd like. #include
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers http://stackoverflow.com/questions/17930948/error-c2106-left-operand-must-be-l-value or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x https://in.answers.yahoo.com/question/index?qid=20111118004034AAeu13R Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up error C2106: '=' : left operand must be l-value up vote 2 down vote favorite Looking at the other questions regarding error C2106, I am still lost as to what the issue is with must be my code. While compiling I get the following errors: c:\driver.cpp(99): error C2106: '=' : left operand must be l-value c:\driver.cpp(169): error C2106: '=' : left operand must be l-value The line of code is as follows: payroll.at(i) = NULL; //Line 99 payroll.at(count++) = ePtr; //Line 169 I am failing to understand why this error is being thrown. In this project I have changed my driver.cpp from an array of employee object pointers to a custom Vector template that I made. must be l I declare the Vector as follows... //Declare an Vector to hold employee object pointers MyVector
& Humanities Beauty & Style Business & Finance Cars & Transportation Computers & Internet Consumer Electronics Dining Out Education & Reference Entertainment & Music Environment Family & Relationships Food & Drink Games & Recreation Health Home & Garden Local Businesses News & Events Pets Politics & Government Pregnancy & Parenting Science & Mathematics Social Science Society & Culture Sports Travel Yahoo Products International Argentina Australia Brazil Canada France Germany Indonesia Italy Malaysia Mexico New Zealand Philippines Quebec Singapore Taiwan Hong Kong Spain Thailand UK & Ireland United States Vietnam Espanol About About Answers Community Guidelines Leaderboard Knowledge Partners Points & Levels Blog Safety Tips Computers & Internet Programming & Design Next What is the cause behind " error C2106: '=' : left operand must be l-value "? in visual studio c++ 6.0 why does this error come and how to get rid of this?? Follow 3 answers 3 Report Abuse Are you sure that you want to delete this answer? Yes No Sorry, something has gone wrong. Trending Now Answers Relevance Rating Newest Oldest Best Answer: Quote from Wiki: Lvalues are values that have addresses being programmatically accessible to the running program (e.g., via some address-of–operator like "&" in C/C++), meaning that they are variables or dereferenced references to a certain memory location. End Quote This means that you try to assign a value into something that is not a variable. A sample would be: 6 = num; Since 6 is not a variable, it cannot be assigned to, and will produce the said error. Try to check if this occurs in your program. Check the if, for and while because these are the common place where a "=" is being used instead of "==". Hope this helps. Source(s): MT · 5 years ago 0 Thumbs up 0 Thumbs down Comment Add a comment Submit · just now