获取有关使用未初始化 memory 的错误代码

Question

I am using visual studio to code with, and I do not understand why i am getting the error "Error C6001 - Using uninitialized memory '*tempPtr' " at only the line right below the else if condition statement.

void removeNumber(double*& arrayPtr, double number, int& size) {

    bool found = false;
    double* tempPtr = new double[size-1];
    for (int i = 0; i < size; i++) {

        if (arrayPtr[i] == number) {
            found = true;

        }
        else if (found == false && arrayPtr[i] != number) {

            arrayPtr[i] = tempPtr[i];

        }
        else {

            arrayPtr[i] = tempPtr[i - 1];
        }

    } delete[] arrayPtr;
    arrayPtr = tempPtr;
    --size;
}

Answer 1

 arrayPtr[i] = tempPtr[i];

In this line, you try to assign an uninitialized tempPtr[i] to an initialized arrayPtr[i]. It should be the other way around. However, if what you want to do is to assign a null pointer to arrayPtr[i], you can initialize tempPtr with null pointers.

This is not related to the question but I notice at the end you de-allocate the memory for arrayPtr and then use arrayPtr. This will crash your program at run-time. You only want to de-allocate when you have no use for it anymore.