Import official C23 code examples for Modern C (Jens Gustedt, 2024)HEADupstream-importmain

- Add official C source files, Makefile, c23-fallback.h, and LICENSE
- Update README.md with study mirror notice

1 files changed, 25 insertions, 0 deletions

diff --git a/tendots.c b/tendots.c
new file mode 100644
index 0000000..0733747
--- /dev/null
+++ b/tendots.c
@@ -0,0 +1,25 @@
+#include <stdio.h>
+
+/* delay execution with some crude code,
+   should use thrd_sleep, once we have that */
+void delay(double secs) {
+  double const magic = 4E8;  // works just on my machine
+  unsigned long long const nano = secs * magic;
+  for (unsigned long volatile count = 0;
+       count < nano;
+       ++count) {
+    /* nothing here */
+  }
+}
+
+int main(int argc, [[maybe_unused]] char* argv[argc+1]) {
+  fputs("waiting 10 seconds for you to stop me", stdout);
+  if (argc < 3) fflush(stdout);
+  for (unsigned i = 0; i < 10; ++i) {
+    fputc('.', stdout);
+    if (argc < 2) fflush(stdout);
+    delay(1.0);
+  }
+  fputs("\n", stdout);
+  fputs("You did ignore me, so bye bye\n", stdout);
+}