-
C++ wasn’t built with exceptions from day one. “C with classes” started in 1979, and exceptions were added in 1989. Meanwhile, the
streams
library was written as early as 1984 (later becomesiostreams
in 1989 (later reimplemented by GNU in 1991)), it just cannot use exception handling in the beginning.Ref:
-
You can enable exceptions with the
.exceptions
method.
// ios::exceptions
#include <iostream>
#include <fstream>
#include <string>
int main () {
std::ifstream file;
file.exceptions(ifstream::failbit | ifstream::badbit);
try {
file.open ("test.txt");
std::string buf;
while (std::getline(file, buf))
std::cout << "Read> " << buf << "\n";
}
catch (ifstream::failure& e) {
std::cout << "Exception opening/reading file\n";
}
}