There could be gundreds of way to do that. Here is one: template<class T> void dumpVector( const std::vector<T>& vect ) { for ( std::vector<T>::const_iterator iter = vect.begin(); iter != vect.end(); ++iter ) { std::cout << ” ” << *iter; } } for ( std::map<vector<double>,vector<int>>::const_iterator mapIter = path.begin(); mapIter != path.end(); ++mapIter ) { std::cout << … Read more
Your code should compile if you: choose one of class/struct in types and one of class/typename in template parameters use semicolons after class or struct definitions write > > instead of >> in nested templates (pre C++11) 5 solved Generic class with type as pointer to object of another class – NOT WORKING [closed]
The function does not make sense. For starters it is unclear why you are using a pointer to the vector instead of a reference to the vector. Nevertheles, this declaration vector<unsigned char> vec(5); does not reseeve a memory for the vector. It initializes the vector with 5 zero-characters which will be appended with other characters … Read more
The issue is that for each iteration of the for loop, the std::sort can potentially change the already sorted column. For example, if you sort column i, then columns i-1, i-2, etc. can lose the changes that were made to sort those columns. Without changing too much of your original code, and albeit not the … Read more
You can use Enhanced for loop to iterate over a vector for (Integer digit : digits) { } We also know the size of the vector, we can write a for loop using vector.size(). for(int index = 0; index < digits.size(); index++) { System.out.println(digits.get(index)); } You can also follow the other ways given here 1 … Read more
From your non-understable question, I can guess that you want the vector to treat the [] operator as “edit if it is exist or create if it is not”. Some thing like the behavior of [] operator in std::map for example.. You simply can not. It was not designed like this. BTW, you may do … Read more
As others have mentioned in the comments, you should not be using insert in this case, you should be using push_back vectorB.push_back(*it); You would typically use insert if there is a specific position that you want to insert the new element. If you are not interested in adding the element to a specific position, then … Read more
Introduction The C++ vector is a powerful container that allows for dynamic memory allocation and efficient data manipulation. However, it is possible to encounter errors when attempting to use the vector, such as the “Size of C++ vector is invalid” error. This error occurs when the size of the vector is not valid, either because … Read more
You did not show the code which adds the Child*s to the vector, but the symptoms you describe provide compelling evidence that you used pointers to some kind of local or temporary objects, which go out of scope (are destroyed) while the vector still holds the pointers. Your program hangs as a result of using … Read more
Your functions are using passing by value, therefore, a copy is seen within the function. Please read about passing by reference void lire_tab(vector<int>& A); solved issue with std vector in c++ [closed]
Use output.put(i); since it takes one character at a time. But you really want to skip the for-loop and just write the whole vector in one write: output.write(f.data(), f.size()); 2 solved Save an unsigned char vector one by one
You’re accessing outside the vector. When you get to the last iteration of the for loop in bubbleSort(), numbers[i] is the last element of the vector, and numbers[i+1] is outside. This results in undefined behavior, and in your case it happens to access the -1 that you initially put in the vector and then popped … Read more
Try looking at the diff function in numpy. That will give you the difference between each value and its right neighbor. You can then check if that value is smaller or larger than 0. 0 solved Python check if one value is greater than the next one in array/vector [duplicate]
Learn how to debug. If you cannot trace line-by-line through your code, then try to keep some kind of log. For now at least output this to the console. In your case 1. Verify the input file opened successfully 2. Print out each gift as you read it in. would be a good way to … Read more
@cauchy: a map of pairs would be slower and more complex than it needs to be. Dumping the results to stdout actually takes more lines than a simple solution: // assuming compiler doesn’t support initialization lists for std::vector: int ai[] = { 1, 1, 1, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, … Read more