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, 8 insertions, 0 deletions

diff --git a/precision.c b/precision.c
new file mode 100644
index 0000000..efea85b
--- /dev/null
+++ b/precision.c
@@ -0,0 +1,8 @@
+#include <stdio.h>
+
+int main(void) {
+  printf("%.20e %.20e\n",
+         ((1.0E-13 + 1.0E-13)),
+         (1.0E-13 + (1.0E-13 + 1.0)) - 1.0
+         );
+}