online compiler and debugger for c/c++

code. compile. run. debug. share.
Source Code    Language
/****************************************************************************** Online C++ Compiler. Code, Compile, Run and Debug C++ program online. Write your code in this editor and press "Run" button to compile and execute it. *******************************************************************************/ #include <iostream> int a(int n){int k=2,s=0;while(++k<n)s+=a(k)*a(n+~k);return s?s:1;} int main() { int number; std::cout << "n: "; std::cin >> number; std::cout << "nth number in Catalan sequence:"<<a(number)<<'\n'; }

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