add numerical recipes library

lib/nr/cpp/other/print_array.h

@@ -0,0 +1,26 @@
+#ifndef _PRINT_ARR_
+#define _PRINT_ARR_
+
+#include <iostream>
+#include <iomanip>
+#include "nrutil.h"
+using namespace std;
+
+template<class T>
+void print_array(const NRVec<T> &a, const int n_per_row, const int col_width)
+{
+	int i,j=0;
+
+	int n_elements=a.size();
+	for (i=0; i < n_elements; i++) {
+		if (j == n_per_row) {
+			cout << endl;
+			j=0;
+		}
+		cout << setw(col_width) << a[i];
+		j++;
+	}
+	cout << endl;
+}
+
+#endif /* _PRINT_ARR_ */