#include <sstream>
#include <cassert>
int main()
{
{
std::stringstream ss(" 123 456 ");
assert(ss.rdbuf() != 0);
assert(ss.good());
assert(ss.str() == " 123 456 ");
int i = 0;
ss >> i;
assert(i == 123);
ss >> i;
assert(i == 456);
ss << i << ' ' << 123;
assert(ss.str() == "456 1236 ");
ss.str("5466 89 ");
ss >> i;
assert(i == 5466);
ss >> i;
assert(i == 89);
ss << i << ' ' << 321;
assert(ss.str() == "89 3219 ");
}
{
std::wstringstream ss(L" 123 456 ");
assert(ss.rdbuf() != 0);
assert(ss.good());
assert(ss.str() == L" 123 456 ");
int i = 0;
ss >> i;
assert(i == 123);
ss >> i;
assert(i == 456);
ss << i << ' ' << 123;
assert(ss.str() == L"456 1236 ");
ss.str(L"5466 89 ");
ss >> i;
assert(i == 5466);
ss >> i;
assert(i == 89);
ss << i << ' ' << 321;
assert(ss.str() == L"89 3219 ");
}
}