I have a problem whith file o/i
I wrote program that input string to a file
and I want the user to enter the file name
and I use these way
cin>>filename;
ifstream myfile (filename);
the compile gave me this
cannot convert parameter 1 from 'class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >' to 'const char *'
but if i use the file name directly like this
ifstream myfile ("test.txt");
it's works
please help me !!!
and I want the user to enter the file name
and I use these way
cin>>filename;
ifstream myfile (filename);
the compile gave me this
cannot convert parameter 1 from 'class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >' to 'const char *'
but if i use the file name directly like this
ifstream myfile ("test.txt");
it's works
please help me !!!
filename is an std::string, but the constructor for std::ifstream only takes C strings (nul-terminated char arrays). To get the C string corresponding to an std::string, call std::string::c_str(). For your case, that would be filename.c_str().
I really can't imagine what they were thinking when they defined that constructor.
I really can't imagine what they were thinking when they defined that constructor.
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