// File: str2int.cpp
// Demo to convert string to int using istringstream

#include <iostream>
#include <sstream>
#include <string>

using namespace std;

void main()
{int n;
 string line;
 cout << "Enter a string that might represent an integer >";
 cout.flush();
 getline(cin,line);
 istringstream str2int(line);
 if (str2int.good()) {
	 str2int >> n;
	 // The peek function looks at the next char in a stream
	 char peekChar=str2int.peek();
	 // If that char is not whitespace and there is a char to peek at, fail
	 if (peekChar!=' ' && peekChar!='\n' && peekChar!=-1)  
			// peekChar==-1 means nothing left to peek at
		 cout << "Conversion error";
	 else 
		 cout << n << endl;
 }
}