Inital commit for udemy c++ course

.gitignore

@@ -18,3 +18,11 @@
 !k\&r/*/[0-9]*.c
 # and header files
 !k\&r/*/*.h
+
+# ---- udemy c++ .gitignore ----
+# except udemy cpp
+!udemy-cpp/
+# excpet chapters
+!udemy-cpp/[0-9]*/
+# except solutions 
+!udemy-cpp/*/[0-9]*.cc

README.md

@@ -1,3 +1,4 @@
 # Solutions to varius excersises
 Solutions to varius excersises from different sources.
 - k&r - [The C Programming Language](https://en.wikipedia.org/wiki/The_C_Programming_Language)
+- udemy-cpp - [Quick Start to Modern C++ for Programmers](https://www.udemy.com/course/quick-start-to-modern-c-for-programmers/)

udemy-cpp/01-basics/01-ranges.cc

@@ -0,0 +1,22 @@
+#include <cstdint>
+#include <cinttypes>
+#include <iostream>
+
+/* somewhat overcomplicated, could use macros provided by cstdint */
+/* take advantage of two's complement */
+#define INT_TEST(BITS) \
+    std::int##BITS##_t i##BITS = ~(~UINT##BITS##_C(0) << (BITS-1)); \
+    std::uint##BITS##_t u##BITS = -1; \
+    std::printf("%-10s %" PRId##BITS "\n", "int"#BITS"_t" , i##BITS); \
+    std::printf("%-10s %" PRIu##BITS "\n", "uint"#BITS"_t" , u##BITS)
+
+#define BITS X(8) X(16) X(32) X(64)
+
+/* prints sizes of varius (u)intX_t types */
+int main()
+{
+    std::cout << "max values of intx_t";
+    #define X(B) std::cout << '\n'; INT_TEST(B); 
+    BITS
+    #undef X
+}