is the action of adding an element at the end of a container.
push-back is the action of adding an element at the end of a container.
Questions tagged [push-back]
420 questions
0
votes
0 answers
Is there a way to add names of 5 students with 3 exams scores each to a vector?
I am lost again, I know that there is a way to use push_back to add to the vector, but I am at a loss for how I can actually get it to work. What I am trying to do is add 5 students to a vector (Egrades), and with each student gather 3 separate exam…
Pierce2307
- 41
- 2
0
votes
1 answer
push_back copy objects even for temps although stating otherwise in it's definition?
one of push_back definition is
push_back(const value_type& __x)
so Having my_vector2.push_back( obj ); will result in passing object obj by reference( No copy during passing object) still it call the copy constructor in the body of push_back…
KMG
- 1,433
- 1
- 8
- 19
0
votes
1 answer
Troubles with inserting elements in dynamic array in C
I have a dynamic array with this struct:
typedef struct vector_struct {
size_t e_sz;
char e_type;
#define V_INT 1
#define V_DOUBLE 2
#define V_CHAR 3
#define V_FLOAT 4
unsigned no_e;
unsigned cur_cap;
void* e_array;
}*…
Mattia Orsi
- 3
- 2
0
votes
2 answers
Pushback elements of other arrays
I created two arrays A and B, the array C should store the first elements of A and B.
Ex : A={1,2,3}, B={4,5,6}, C must be {1,4,2,5,3,6}.
My program doesn't show anything after the input of my arrays.
This is my loop :
for(int i(0);i<3;i++){
…
Hibou
- 196
- 2
- 3
- 10
0
votes
2 answers
Using "push_back" for vector with "get" function C++
I have a class called "Region", and I have a class called "Map". The "Map" class has a vector of type "Region *" called "regions" as a member. In the .cpp file for the "Map" class, I have a "getRegions" function that returns this "regions"…
wolfeweeks
- 355
- 4
- 12
0
votes
1 answer
The program is not collecting data from csv file?
#include"std_lib_facilities.h"
void login(){
fstream fin;
fin.open("user.csv",ios::in);
vectordata;
string word;
string temp;
string line;
while(fin>>temp){
data.clear();
getline(fin,line);
stringstream s(line);
…
Sree Hari
- 17
- 5
0
votes
0 answers
push_back using raw pointers vs using smart pointers
I am having trouble understanding how to create new objects of a class and push it into a vector using smart pointers.
using raw pointers it would look something like this:
std::vector creat_cards; // vector with the objects
std::vector…
konoha
- 57
- 1
- 8
0
votes
2 answers
Linked Lists (very intro) InsertBack
#include
#include
struct node
{
int data;
struct node *next;
};
typedef struct node node;
node* insertFront(node* head, int d);
node* insertBack(node* head, int d);
void print(node* head);
int max(node* head);
int…
0
votes
0 answers
vector push_back after curly braces initializer does not work in C++
I have a vector with {} initializer. And then I use push_back to add an element into the vector.
When I print the vector elements, the pushed element does not print. Why is that?
int main() {
vector vec = {0,1,2,3,4,5,6,7,8,9};
…
Yun Li
- 407
- 1
- 5
- 13
0
votes
1 answer
Segmentation fault when trying to push to either an int stack or vector in C++
right now I'm trying to solve a competitive programming problem but whenever I try to push to a vector (bb), it gives me a segfault. I've tried fixing this by switching from stack to vector and by just attempting to push a regular integer with no…
Xiao
- 17
- 1
0
votes
2 answers
Implementing push_back(T&& c) in custom Vector class
As part of an assignment in Uni I have to implement a partial clone of the stl::vector class. I've managed nearly all the functionality but I am stumped with how to do push_back(T&& c). We're not allowed to implement emplace like STL itself uses.…
Daniel
- 33
- 1
- 5
0
votes
0 answers
Data archive saving - Process returned -1073741819 <0xC0000005>
I'm having some trouble. After coding a full oriented object programming on C++, I'm trying to save the data in a archive, to use it again every single time that the program opens.
In the first line, it is confirmed:
"Student Daniel Cassiano has…
Daniel Cassiano Chaves
- 303
- 3
- 18
0
votes
1 answer
Why behavior changes as order of a emplace_back / push_back changes ? Why number of Constructor increases?
class Buffer
{
unsigned char* ptr{nullptr};
size_t length{0};
public:
Buffer() :
ptr(nullptr),
length(0)
{std::cout<<"\n In Buffer()\n";}
explicit Buffer(size_t const size):
ptr(new unsigned char[size] {0}),
…
Sumeetkumar Satpute
- 21
- 1
- 3
0
votes
0 answers
How do I use strings with vectors in vectors (2D Vectors?)
I'm trying to create a vector that has vectors inside it, but I'm dealing with string and cin
My goal is to ask the user to list out student names, and for each student listed, a vector will be created under "stuNameVecs" vector. Then these…
Ahed N
- 1
0
votes
1 answer
Why am i getting an overlad error when using .pushback on vector enclosed by a vector
I'm trying to create a hash table with a vector inside a vector made of a struct. v[1].push_back(value); it's giving me an error:
error C2664: 'void std::vector>::push_back(_Ty &&)': cannot convert argument 1 from 'int' to…
Boarn
- 3
- 2