open_pointer.pass.cpp revision bc8d3f97eb5c958007f2713238472e0c1c8fe02c
1//===----------------------------------------------------------------------===// 2// 3// ��������������������The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9 10// <fstream> 11 12// template <class charT, class traits = char_traits<charT> > 13// class basic_fstream 14 15// void open(const char* s, ios_base::openmode mode = ios_base::in|ios_base::out); 16 17#include <fstream> 18#include <cassert> 19 20int main() 21{ 22 { 23 std::fstream fs; 24 assert(!fs.is_open()); 25 fs.open("test.dat", std::ios_base::in | std::ios_base::out 26 | std::ios_base::trunc); 27 assert(fs.is_open()); 28 double x = 0; 29 fs << 3.25; 30 fs.seekg(0); 31 fs >> x; 32 assert(x == 3.25); 33 } 34 std::remove("test.dat"); 35 { 36 std::wfstream fs; 37 assert(!fs.is_open()); 38 fs.open("test.dat", std::ios_base::in | std::ios_base::out 39 | std::ios_base::trunc); 40 assert(fs.is_open()); 41 double x = 0; 42 fs << 3.25; 43 fs.seekg(0); 44 fs >> x; 45 assert(x == 3.25); 46 } 47 std::remove("test.dat"); 48} 49