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Why are my variables reporting as "undeclared identifier" when compiling?


Why are my variables reporting as "undeclared identifier" when compiling?

By : user2957700
Date : November 24 2020, 01:01 AM
it should still fix some issue You have semi colons at the end of the for statements which turns them into single line statements:
code :
for(int iY=0;iY<(Height-YRemainder);iY=iY+16);
for(int iY=0;iY<(Height-YRemainder);iY=iY+16)


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Why does the compiler say "undeclared identifier" for a variable I declared in the "if" statement ju

Why does the compiler say "undeclared identifier" for a variable I declared in the "if" statement ju


By : spalenzuela
Date : March 29 2020, 07:55 AM
Does that help currentID only exist in the if and the else, outside that its not declared, you can declare it before the IF and initialize inside the IF and Else.
Also as commented if select its not 1 or 2 it would not be initialized and can cause problems so make sure to initialize it.
code :
void IDcard::Prepare(CoatingDecorator *coating)
{
IDcard *currentID;

if (select == 1) { currentID = new Passport(); }
else if (select == 2) { currentID = new DriversLicence();   }

AddPhoto();
coating->Prepare(currentID);
std::cout << "Total Cost: " << coating->totalCost; 
DispenseID();
}
Xcode Admob singleton - "use of undeclared identifier "shared"" error

Xcode Admob singleton - "use of undeclared identifier "shared"" error


By : anoj tambe
Date : March 29 2020, 07:55 AM
Any of those help You are using shared, but you haven't defined it as a variable (local or otherwise).
So, change
code :
shared = [GADMasterViewController singleton];
[shared resetAdview:self]
GADMasterViewController  *shared = [GADMasterViewController singleton];
[shared resetAdview:self];
[[GADMasterViewController singleton] resetAdview:self];
Getting errors of "unused variable" and "undeclared identifier" in simple function I am trying to wr

Getting errors of "unused variable" and "undeclared identifier" in simple function I am trying to wr


By : Huawei Wang
Date : March 29 2020, 07:55 AM
I hope this helps you . So I am writing a cipher program as part of the Harvard CS50 course and I have this code to check if a character + the cipher key will put it out of ASCII alphabetical range and to loop it back around if it does (as well as preserving case). The array types being cycled through are 'char' (in plainText) and 'int' (in cipherArray) ,
Could someone let me know where I am going wrong?
JAGS errors: "Resolving undeclared variables" and "Invalid vector argument to exp"

JAGS errors: "Resolving undeclared variables" and "Invalid vector argument to exp"


By : RDM
Date : March 29 2020, 07:55 AM
like below fixes the issue You are supplying a column vector from V to exp. In JAGS, inverse link functions can only be given scalar values. Basically, to properly code out softmax regression you will need to iterate through each element of V. Additionally, V must be a three dimensional vector (person x subject x 3 choices).
How to solve "Undeclared identifier error" in "if" block?

How to solve "Undeclared identifier error" in "if" block?


By : Lee-Jay Cluskey-Bela
Date : September 30 2020, 11:00 AM
will be helpful for those in need You intuition is correct. The lifetime of V0 ends at the closing curly bracket of the enclosing if. The object is destroyed and the name isn't visible in the outer scope.
You could solve the problem by moving it outside the if.
code :
void mexFunction(int nlhs, mxArray* plhs[], int nrhs, const mxArray* prhs[])
{
    vector<vector<int>> V0;
    int i; // hey, this is uninitialized!
    if (i == 0) // if block
    {
        mwSize Num = mxGetNumberOfElements(prhs[i]);
        V0.resize(Num);
    }
    cout << V0.size() << "\n"; // the vector is visible here
}
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