1 //===----------------------------------------------------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 // <strstream>
11 
12 // class ostrstream
13 
14 // ostrstream(char* s, int n, ios_base::openmode mode = ios_base::out);
15 
16 #include <strstream>
17 #include <cassert>
18 
main()19 int main()
20 {
21     {
22         char buf[] = "123 4.5 dog";
23         std::ostrstream out(buf, 0);
24         assert(out.str() == std::string("123 4.5 dog"));
25         int i = 321;
26         double d = 5.5;
27         std::string s("cat");
28         out << i << ' ' << d << ' ' << s << std::ends;
29         assert(out.str() == std::string("321 5.5 cat"));
30     }
31     {
32         char buf[23] = "123 4.5 dog";
33         std::ostrstream out(buf, 11, std::ios::app);
34         assert(out.str() == std::string("123 4.5 dog"));
35         int i = 321;
36         double d = 5.5;
37         std::string s("cat");
38         out << i << ' ' << d << ' ' << s << std::ends;
39         assert(out.str() == std::string("123 4.5 dog321 5.5 cat"));
40     }
41 }
42