How To Let The User Add Size To My Array In Cpp

You don't know array size beforehand, so you need to create a pointer string names. Then you allocate enough memory using new stringtstnms You enter the value after array declaration. That is strange. You should first enter the size of the array and then allocate enough space. tstnms is not a constant you enter the value in it.

data_type pointer_variableName new data_typearray_size Here, data_type is the type of data that we want to store in the array. pointer_variableName declares a pointer variable. new is a keyword used for dynamic memory allocation. array_size is the size of the array we want to allocate. C Program to Dynamically Allocate an Array

Hello, I am doing some homework and I'm trying to get a user to input the size of the array and then have them fill in the values, at first I wanted to try and do it through a function but you can only return a single output, so i gave up on that and decided to get the data in main instead, if I try to run my code below i get errors of expression must be constant. is there something I am missing?

How do i let the user determine the size of an array? kingkush I am trying to write a program where the user can determine how large to make the array but i keep running into problems. What the user wants the array size to be but in this case where you using just include ltiostreamgt in a cpp file the first opinion are wordy overkill

I dont want to put a specific number for the array size. I want the array size to be however many chars the user input was. The getline function, however, requires a specific number for the size of the array. prints out the reversed string no need for flush cout ltlt quot92nquot plus add endline print out string again!! cout ltlt ptr

In C the size of an array is set at compile-time, period. Like other users suggested, you can use dynamic allocation to obtain a run-time-determined-length contiguous area in memory, of your choice of size Using stdvector, stdunique_ptr, stdshared_ptr or even plain allocation with new although the latter is not recommended.

Take User Input Array in a Function by Declaring Array in the Function. Another method to gather user input into an array is by declaring the array directly within the function where you need it. Here, the array becomes a local variable within the function. You can loop through the array, collect user input, and store it in the array. Source Code

In C, an array is defined with a fixed size, and its type can be any data type, including primitive types such as int, char, or user-defined types. Characteristics of Arrays in C Fixed Size Once declared, the size of an array cannot be changed during runtime. Homogeneous Elements All elements in an array must be of the same type

int i set i at runtime const int size i int arraysize error, size not known at compile time If you want a dynamically-sized object, you can access heap-based memory with some form of the new operator int size set size at runtime int array new intsize fine, size of array can be determined at runtime

C program to change array size dynamically. We will go through each step individually. 1. Declaring Variables. Code int array_pointer int total_user_entries 0 int loop_count 0 int temporary50 int flag 0 array_pointer Integer pointer is used to store pointer to the array we want to store user input in.