Update: Using C++26 with contracts enabled

modules/01_fundamentals/CMakeLists.txt

@@ -1,7 +1,7 @@
 add_course_exercise(
     NAME hello_world
     MODULE 01_fundamentals
-    STANDARD 17
+    STANDARD 26
     SOURCES
         src/hello_world.cpp
         test/hello_world_test.cpp
@@ -10,7 +10,7 @@ add_course_exercise(
 add_course_exercise(
     NAME variables_and_types
     MODULE 01_fundamentals
-    STANDARD 17
+    STANDARD 26
     SOURCES
         src/variables_and_types.cpp
         test/variables_and_types_test.cpp
@@ -19,7 +19,7 @@ add_course_exercise(
 add_course_exercise(
     NAME operators
     MODULE 01_fundamentals
-    STANDARD 17
+    STANDARD 26
     SOURCES
         src/operators.cpp
         test/operators_test.cpp
@@ -28,7 +28,7 @@ add_course_exercise(
 add_course_exercise(
     NAME basic_io
     MODULE 01_fundamentals
-    STANDARD 17
+    STANDARD 26
     SOURCES
         src/basic_io.cpp
         test/basic_io_test.cpp