pr19003.cpp

来自「c++编程宝典源码及Quincy99编译器 是《标准C++编程宝典》电子工业出」· C++ 代码 · 共 32 行

////////////////////////////////////////
// File Name: pr19003.cpp
////////////////////////////////////////
#include <fstream>

int main()
{
    std::cout << "Opening file..." << std::endl;
    std::ofstream tfile("test.dat", std::ios::noreplace);

    if (tfile.fail())
    {
        std::cout << std::endl
                  << "File already exists!" << std::endl
                  << "Delete it (Y/N)?" << std::endl;

        char ch;
        std::cin >> ch;
        if ((ch == 'Y') || (ch == 'y'))
        {
           std::ofstream tfile("test.dat");
           tfile << "These are test data";
           tfile << ", and these are more";
           std::cout << "New file created." << std:: endl;
        }
        else
            std::cout << "File not opened." << std:: endl;
    }

    return 0;
}