What will be reason behind this error?

I am fresher in iphone programming.Whenever i create a new project in x-code it's giving this error.Please anybody, help me to solve this problem.I am attach开发者_C百科ing snapshot below:-

It'll be a great help. Thank you

---

You just need to add those missing headers to your project.

---

check out your .h file.

Might be you had deleted @end by mistake or somewhere ‘;’ is missing after statement declarations.