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Generating Pseudo Random Number/Capital Letter

Parwarrior7 asked:

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Hello everyone,

In my program I have to generate a random number/capital letter and cast it as a char.
Online I was able to locate an algorithm that does nearly that:
int main() {
        srand((unsigned) time(NULL));
        const int passLen = 10;
        for (int i = 0; i < passLen; i++) {
                cout << (char) (rand() % ('z' - '0' + 1) + '0');

My problem is, I don't completely understand how this method works, and because of this I'm not sure how to modify the function to get it to do what I want. Could anyone please explain approximately how this process works so that I can learn to modify this function to my liking?

Thank you, sorry for the fairly basic question. I'm still pretty new to this.
Tags: C++, Algorithms, ASCII


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