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, 22 insertions, 0 deletions

diff --git a/locale.c b/locale.c
new file mode 100644
index 0000000..8e258f2
--- /dev/null
+++ b/locale.c
@@ -0,0 +1,22 @@
+#include <locale.h>
+#include <stdio.h>
+
+/* You may have to unset the LANGUAGE environment variable for this to
+   work properly. */
+
+int main(int argc, char* argv[argc+1]) {
+  perror("With C locale");
+  if (!setlocale(LC_ALL, ""))
+    perror("couldn't set locale");
+  else
+    perror("With default locale");
+  if (!setlocale(LC_MESSAGES, "C"))
+    perror("couldn't set locale");
+  else
+    perror("C locale, again");
+  if (argv[1] && !setlocale(LC_MESSAGES, argv[1]))
+    perror("couldn't set locale");
+  else
+    perror("new locale");
+  printf("commandline argument was '%s'\n", argv[1]);
+}