Why the code ia showing error?

Question

#include <iostream>
using namespace std;

void main()
{
int a;
cout << "Please enter a number \n";
cin >> a;

cout << a;
}

Answer 1

You need int main() instead of void main(), and return 0; at the end of main().

Answer 2

Yeah, what Rowsej said. Integer return type for main is a must. Returning 0 explicitly is optional though. The compiler adds it in for you if you don't write one in main().

http://www.stroustrup.com/bs_faq2.html#void-main