hmmm char string to variable double or int

Code:

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// this 3 are user input
char szNum1[];
char szNum2[];
char szNum3[];

---

after the user input for example 3, 21 and 25

i need to make this strings into int or double variables, so i can use them to make some math operations after.

I have tryed this because this is what they though me, but looks like with strings wont work :P

Code:

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szNum1 = static_cast<double>(szNum1);
szNum2 = static_cast<double>(szNum2);
szNum3 = static_cast<double>(szNum3);

---

any idea of how I can make this work guys?

Thank you for your time.

You need to perform a conversion. Casting will only cause you grief.

any idea of how? i am just starting C++, and have 0 knoledge about C :(

By clicking the link Prelude wrote ;)

lol thanks so many hours reading made my head go weird that i didnt see the link :P, i better go take some fresh air then continue hehe