diff --git a/slides/ProgrammingInCxx_2024_d4.pdf b/slides/ProgrammingInCxx_2024_d4.pdf
new file mode 100644
index 0000000000000000000000000000000000000000..81002e5f79c0126bfd88ade43baa4cc30e9561a3
Binary files /dev/null and b/slides/ProgrammingInCxx_2024_d4.pdf differ