I am trying to take values in a 2d vector called alloc from the user but the alloc zero index is the only changed index and the values of each index override it i don’t know why (i.e: only the first index of the 2d vector is affected) Code: cout<<"Please Enter n"<<endl; cin>>n; cout<<"Please Enter ..
Category : 2d-vector
I have a vector a strings, witch is basically a grid. vector<string> tempo(0); bla blooper vroom yahoo i would like iterate the columns and i forgot how. not all of the string are of the same length. the end result should be a new vector of strings: bbvy llra aooh ooo pmo e r how ..
I am trying to create an adjacency list graph representation using a vector(V) of vectors(v). My goal is for every new vertex value entered, I increment the size of the V*, and insert the new value into the open spot, which would then be the starting value of v**. I then want to create an ..
let’s say I have a vector storing vectors of strings. std::vector<std::vector<std::string>> MyVec = { {}, {} } I want to use anything equivalent to .push_back(X) such that the vector will now look as following: { {X}, {} }. Does anyone have an idea for a way to solve this? Source: Windows Que..
I am trying to read a file "chartIn.txt" that stores seats on a plane in the format: 1 A B C D 2 A B C D … I have read the file with method readChart() in the Plane class. It seams to read the file and store in 2d vector seatChart. When I enter ..
How can I access 2d vector using auto iterator? I write a code using auto iterator but it is not run just showing: – Compilation Error: Compilation Error prog.cpp: In member function std::vectorstd::vector<int > Solution::sortedMatrix(int, std::vectorstd::vector<int >): prog.cpp:18:31: error: no match for operator[] (operand types are std::vectorstd::vector<int > and __gnu_cxx::__normal_iteratorstd::vector<int*, std::vectorstd::vector<int > >) for(auto col ..
How again -1,2,-1 gets included in the next pair? The question is: Given an integer array nums, return all the triplets [nums[i], nums[j], nums[k]] such that i != j, i != k, and j != k, and nums[i] + nums[j] + nums[k] == 0. public: vector<vector<int>> threeSum(vector<int>& nums) { vector<int>r1; vector<vector<int>>resvec; int s=nums.size(); int i=0,j,k=s-1; ..
So I have a 2d vector of Object pointers which are initialized. Some members have an Object while some are ’empty’ Class Obj{int x, y}; std::vector<std::vector<Obj*>> thing; for(int i = 0; i < 4; i++) { std::vector<Obj*> row(4, 0); for(int j = 0; j < 4; j++) { if(i%2) { Obj* obj1 = new Obj(); ..
#include <bits/stdc++.h> using namespace std; vector< vector<int> >Adj; int main() { int n; cin>>n; Adj.assign(n); } This code doesn’t work for assigning size to the vector. Source: Windows Que..
I have some dynamically allocated objects, type class, on 2d vector and at the end of the program I need to free the memory. My question is which variable for object gives us the vector back, so that I can initialize it with the delete operator? for ( std::vector<std::vector<Enemies*>>::iterator it1 = vec2D.begin(); it1 != vec2D.end(); ..
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