#include <string>
#include <iostream>

using namespace std;

int main(int argc, char* argv[]) {

	string s1 = "This is a test string";
	string s2 = "is";

	cout << "String #1 (s1):" << endl << s1 << endl;
	cout << "String #2 (s2):" << endl << s2 << endl;

	string::size_type find_pos = 0;

	while((find_pos = s1.find(s2, find_pos)) != string::npos)
		s1.erase(find_pos, s2.length());	
	
	cout << endl << "String #1 (s1) without substring s2:" << endl << s1 << endl;	

  	return	0;
}