Add headers (oneapi-src#2384)

* Add headers histogram sample

* Add headers PrefixSum sample

* Add headers 1d_HeatTransfer sample

Author: IgorOchocki

DirectProgramming/C++SYCL/ParallelPatterns/PrefixSum/src/PrefixSum.cpp

@@ -34,6 +34,8 @@
 
 #include <iostream>
 #include <string>
+#include <cmath>
+#include <complex>
 // dpc_common.hpp can be found in the dev-utilities include folder.
 // e.g., $ONEAPI_ROOT/dev-utilities/<version>/include/dpc_common.hpp
 #include "dpc_common.hpp"

DirectProgramming/C++SYCL/ParallelPatterns/histogram/src/main.cpp

@@ -13,6 +13,9 @@
 #include <iostream>
 #include <random>
 
+#include <cmath>
+#include <complex>
+
 // Dense algorithm stores all the bins, even if bin has 0 entries
 // input array [4,4,1,0,1,2]
 // output [(0,1) (1,2)(2,1)(3,0)(4,2)]

DirectProgramming/C++SYCL/StructuredGrids/1d_HeatTransfer/src/1d_HeatTransfer.cpp

@@ -39,6 +39,8 @@
 #include <iomanip>
 #include <iostream>
 #include <string>
+#include <cmath>
+#include <complex>
 // dpc_common.hpp can be found in the dev-utilities include folder.
 // e.g., $ONEAPI_ROOT/dev-utilities/<version>/include/dpc_common.hpp
 #include "dpc_common.hpp"