My code isnt working and i dont know how to solve it | Together C & C++ | Page 1

torn verge Sep 13, 2023, 1:46 AM

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Hello there.
Im trying to create an array from the integer that users input. Tho whenever i try to set a size of an array as the number of digits of the integer, it says expression must have a constant value. Is there a way to solve this?

short forumBOT Sep 13, 2023, 1:46 AM

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torn verge Sep 13, 2023, 1:47 AM

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Why code isnt working and i dont know how to solve it

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My code isnt working and i dont know how to solve it

simple pine Sep 13, 2023, 1:53 AM

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I think it’s because the array’s size needs to be known at compile time, not during run time. And user input is during run time so

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Usually ppl just set the array to be big enough to whatever the biggest possible answer ur gonna get would be

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The size 256 is common for a string I think

frosty fern Sep 13, 2023, 1:55 AM

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Use a vector

simple pine Sep 13, 2023, 1:58 AM

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Just type array[20] or something

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Prob big enough

torn verge Sep 13, 2023, 1:58 AM

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frosty fern Use a vector

can i have an example of a vector use please?

frosty fern Sep 13, 2023, 1:59 AM

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std::vector<int> my_ints(3) if you want a vector of ints size 3

torn verge Sep 13, 2023, 2:00 AM

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what if i want my vector to have the size of the integer that the users input?

frosty fern Sep 13, 2023, 2:01 AM

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std::vector<int> my_ints(whatever_var_you_stored_your_input_in)

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int input;
std::cin >> input;
std::vector<int> my_vec(input);

for example

torn verge Sep 13, 2023, 2:02 AM

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ah thank you!

short forumBOT Sep 13, 2023, 2:07 AM

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@torn verge Has your question been resolved? If so, run !solved :)

torn verge Sep 13, 2023, 2:09 AM

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!solved

#My code isnt working and i dont know how to solve it