std::getline fails at reading file via ifstream - c++

Question

I created this piece of code (using C++11 standards):
#include <iostream>
#include <fstream>
#include <string>
using namespace std;
int main() {
string input;
cout << "Enter the name of a file:\n";
getline(cin, input);
cout << "Reading file...\n";
ifstream readstream(input);
if (!readstream.is_open()) {
cout << "Error while opening file\n";
return 0;
} else {
string currentln;
while (getline(readstream, currentln)) {
cout << currentln;
}
return 0;
}
}
I compiled this code with the mingw-w64 implementation of GCC, with this command:
gcc -std=c++11 read.cpp -o read.exe
It compiled successfully, however, when I run it:
Enter the name of a file:
example.txt
Reading file...
And then nothing. It doesn't output any characters of the file. The file does exist, and it doesn't have any problems opening it. However, when I compile and run this code:
#include <iostream>
#include <fstream>
#include <string>
using namespace std;
int main() {
string input;
cout << "Enter the name of a file:\n";
getline(cin, input);
cout << "Reading file...\n";
ifstream readstream(input);
if (!readstream.is_open()) {
cout << "Error while opening file\n";
return 0;
} else {
char currentchar;
while (!readstream.eof()) {
while(readstream.get(currentchar)) {
cout << currentchar;
}
}
return 0;
}
}
It works.
I compiled it the same way:
g++ -std=c++11 read.cpp -o read.exe
But instead of using getline(), I used ifstream.get();
Can anyone tell me why getline() does not work in this situation?