Whovian said:
std::string filename("/path/to/file");
std::ifstream ifs(filename);std::string filename("/path/to/file");
std::ifstream ifs(filename.c_str());#include <iostream>
#include <fstream>
#include <string>
using namespace std;
int main()
{
string file = "Documents/Programming/C++.txt";
string contents;
ifstream in;
ofstream out;
out.open(file);
out << "This is a C++ program here." << endl;
out.close();
in.open(file);
getline(in,contents);
in.close();
cout << contents << endl;
return 0;
}Whovian said:
jhae2.718 said:
Using a string literal allows us to pass a sequence of characters as an argument to a function or store it in a variable. In the case of file input and output, it allows us to specify the file name or path as a parameter in the appropriate functions.
A string literal is a fixed sequence of characters enclosed in double quotation marks, while a regular string is a sequence of characters stored in a variable. String literals are used to initialize regular strings or pass them as arguments to functions.
Yes, you can use a variable that contains a string as an argument for file input and output functions. However, the variable must be of type char or char*, and it must contain a valid file name or path.
To specify a file path using a string literal, you need to include the full path in double quotation marks. For example, "C:\Users\Documents\file.txt". If you are using a relative path, you can use "../" to move up one directory.
One limitation of using string literals for file input and output is that the file name or path must be known at compile time. This means that you cannot use user input or other variables to specify the file name or path. Additionally, string literals have a maximum length limitation, so they may not be suitable for handling very long file paths.