Initial commit

c++/Others/Another example of read() and write() and illustrates the use of gcount( ).cpp

@@ -0,0 +1,27 @@
+Another example of read() and write() and illustrates the use of gcount( )
+#include <iostream>
+#include <fstream>
+using namespace std;
+int main()
+{
+  double doubleNumberArray[4] = {99.75, -34.4, 1776.0, 200.1};
+  int i;
+  ofstream out("numbers", ios::out | ios::binary);
+  if(!out) {
+    cout << "Cannot open file.";
+    return 1;
+   }
+  out.write((char *) &doubleNumberArray, sizeof doubleNumberArray);
+  out.close();
+  for(i=0; i<4; i++) // clear array
+    doubleNumberArray[i] = 0.0;
+
+  ifstream in("numbers", ios::in | ios::binary);
+  in.read((char *) &doubleNumberArray, sizeof doubleNumberArray);
+  
+  cout << in.gcount() << " bytes read\n"; // see how many bytes have been read
+  for(i=0; i<4; i++) // show values read from file
+     cout << doubleNumberArray[i] << " ";
+  in.close();
+  return 0;
+}