get the length of a string and assign it to an array

Question

Total c++ newbie here.

I have a problem, where I can not assign the number of character in a string to an array size, like so..

string outStr;
ifstream input("read.txt");
getline(input, outStr);

int const n = outStr.length();
int arr[n];

error msg --> expression must have a constant value. although i have declared the "const"

Thanks in advance✌.

`int arr[n]` is not allowed (without non-standard language extensions) if `n` is not known at compile time — Cory Kramer, Nov 02 '18 at 18:20

score 1 · Accepted Answer · answered Nov 02 '18 at 18:20

1

C++ does not support Variable Length Arrays. Use a std::vector instead.

answered Nov 02 '18 at 18:20

Jesper Juhl

1 Answers1