Question

How to clear string stream (stringstream) in C++

Answer 1

#include <iostream>
#include <sstream>

using std::cout;
using std::endl;

int main()
{
	std::stringstream sst("c and c++ programming");

	sst.str("");
	
	sst << "abc";

	char ch;
	do {
		ch = sst.get();
		if (!sst.eof()) cout << ch;
	} while (!sst.eof());
	cout << endl;

	return 0;
}

/*
run:

abc

*/

 

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Answer 2

#include <iostream>
#include <sstream>

using std::cout;
using std::endl;

int main()
{
	std::stringstream sst("c++ programming");

	sst.str(std::string());
	
	sst << "xyz";

	char ch;
	do {
		ch = sst.get();
		if (!sst.eof()) cout << ch;
	} while (!sst.eof());
	cout << endl;

	return 0;
}

/*
run:

xyz

*/

 

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Answer 3

#include <iostream>
#include <sstream>

using std::cout;
using std::endl;

int main()
{
	std::stringstream sst("c c++ php");

	std::stringstream().swap(sst);
	
	sst << "java";

	char ch;
	do {
		ch = sst.get();
		if (!sst.eof()) cout << ch;
	} while (!sst.eof());
	cout << endl;

	return 0;
}

/*
run:

java

*/

 

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