[cpp] Fix root project build and dependencies.

cpp/algorithms/sorting/merge/CMakeLists.txt

@@ -14,6 +14,8 @@ project (
     DESCRIPTION "A project for practicing merge sort in C++"
     LANGUAGES   CXX
 )
+message(STATUS "[Klips] Configuring example: ${PROJECT_NAME}")
+
 add_executable(
     algo-sort-merge merge-sort.cpp
     lib-merge.cpp lib-merge.h

cpp/algorithms/sorting/merge/lib-merge.cpp

@@ -12,6 +12,7 @@
 #include <algorithm>
 #include <iostream>
 #include <vector>
+#include <cstdint>
 
 void MergeSort(std::vector<int> &array, size_t lhs, size_t rhs)
 {