how to read characters from user and construct a sting and then extract part of it using substring?
how to read characters from user and construct a sting and then extract part of it using substring?
On making an effort
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On starting slowly with simple steps and building up towards your complete program.
A development process
For example, post a program which just reads chars and prints them, then see how you feel about the next step.
On choosing meaningful topic titles
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If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
These are basic string operations, but they take a bit of care to code up in C.
Welcome to the forum, pixcel!
You would really benefit if you worked through the C tutorial which is linked to the C Tutorial button at the top of this page. LOTS of basic how-to info in there, for practical use in your programs.
Give that tutorial a read-through, and give your program a try. If you get stuck, post your program and explain the problem. That lets us focus right in on the difficulty, with minimum time spent looking.
