File size: Difference between revisions

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 		  << std::ifstream("/input.txt", std::ios::binary | std::ios::ate).tellg() << "\n";
 }</lang>
+===C++ 17===
+<lang cpp>#include <filesystem>
+#include <iostream>
+void print_file_size(const char* filename) {
+    try {
+        auto size = std::filesystem::file_size(filename);
+        std::cout << "Size of file " << filename << " is " << size << " bytes.\n";
+    } catch (const std::exception& ex) {
+        std::cerr << ex.what() << '\n';
+    }
+}
+int main() {
+    print_file_size("input.txt");
+    print_file_size("/input.txt");
+}</lang>
+{{out}}
+<pre>
+Size of file input.txt is 506 bytes.
+filesystem error: in file_size: No such file or directory [/input.txt]
+</pre>
 =={{header|Clean}}==