Truncate a file: Difference between revisions

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 When specifying a new file size larger than current value, the file will be extended and padded with null bytes.
+=={{header|C++}}==
+<lang C++>#include <string>
+#include <fstream>
+using namespace std;
+void truncateFile(string filename, int max_size) {
+  std::ifstream input( filename, std::ios::binary );
+  char buffer;
+  string outfile = filename + ".trunc";
+  ofstream appendFile(outfile, ios_base::out);
+  for(int i=0; i<max_size; i++) {
+    input.read( &buffer, sizeof(buffer) );
+    appendFile.write(&buffer,1);
+  }
+  appendFile.close();                                                                                                                                                                }
+int main () {
+  truncateFile("test.txt", 5);
+  return 0;
+}
+</lang>
 =={{header|C sharp}}==