#include<iostream>
#include<string>

using std::cout;
using std::cin;
size_type length() const;
int main()
{
char a[100];
int i,x;
cout<<"Enter the string \n";
cin.getline(a,100);
cout<<a;
x=a.length();
cout<<x;
return 0;
}


What is wrong in the code above?