add an example throwing bad_alloc

.gitignore

@@ -16,3 +16,4 @@ shared_ptr
 casts
 classes
 lvalues
+bad_alloc

CMakeLists.txt

@@ -16,3 +16,4 @@ add_executable(shared_ptr shared_ptr.cpp)
 add_executable(casts casts.cpp)
 add_executable(classes classes.cpp)
 add_executable(lvalues lvalues.cpp)
+add_executable(bad_alloc bad_alloc.cpp)

bad_alloc.cpp

@@ -0,0 +1,30 @@
+// https://www.cs.uaf.edu/2010/spring/cs202/lecture/03_02_exceptions.html
+
+#include <iostream>
+
+using namespace std;
+
+void dr_evil(int counter) {
+  int *array = new int[100000000000/(1+10*counter)];
+  cout << "Bwah ha ha!" << endl;
+  delete[] array;
+}
+
+int foo(void) {
+  for (int counter=0; counter<10; counter++) {
+    try {
+      cout << "About to call dr_evil with counter == " << counter << endl;
+      dr_evil(counter);
+
+      cout << "I guess he's not so evil!" << endl;
+      break;
+    } catch (std::bad_alloc &e) {
+      cout << "Caught an exception: " << e.what() << endl;
+    }
+  }
+  return 0;
+}
+
+int main(void) {
+  foo();
+}