Solutions

sheet1/B/file_io.h

@@ -0,0 +1,40 @@
+#ifndef FILE_IO_H_INCLUDED
+#define FILE_IO_H_INCLUDED
+
+#include <string>
+#include <vector>
+//using namespace std;
+
+
+/**
+  This function opens the ASCII-file named @p file_name and reads the
+  double data into the C++ vector @p v.
+  If the file  @p file_name does not exist then the code stops with an appropriate message.
+  @param[in]    file_name   name of the ASCII-file
+  @param[out]   v           C++ vector with double values
+*/
+
+void read_vector_from_file(const std::string& file_name, std::vector<short>& v);
+
+
+/**
+  This function opens the ASCII-file named @p file_name and rewrites its with the
+  double data from the C++ vector @p v.
+  If there are problems in opening/generating file  @p file_name
+  then the code stops with an appropriate message.
+  @param[in]    file_name   name of the ASCII-file
+  @param[in]    v           C++ vector with double values
+*/
+
+void write_vector_to_file(const std::string& file_name, const std::vector<double>& v);
+
+/**
+  Fills the double-vector @p v with data from an input stream @p istr until this input stream
+  ends regularily. The vector is cleared and its memory is automatically allocated.
+  @param[in]    istr        input stream
+  @param[out]    v           C++ vector with double values
+  @warning     An exception is thrown in case of wrong data format or corrupted data.
+*/
+void fill_vector(std::istream& istr, std::vector<double>& v);
+
+#endif // FILE_IO_H_INCLUDED