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, 17 insertions, 0 deletions

diff --git a/strcpy.c b/strcpy.c
new file mode 100644
index 0000000..a34dd71
--- /dev/null
+++ b/strcpy.c
@@ -0,0 +1,17 @@
+#include <string.h>
+#include <stdio.h>
+int main(int argc, char* argv[argc+1]) {
+  size_t const len = strlen(argv[0]); // Computes the length
+  // Initialized VLA, /*@\C{23}*/
+  // terminates array with 0 character
+  char name[len+1] = { };
+  // Copies the program name
+  memcpy(name, argv[0], len);
+  if (!strcmp(name, argv[0])) {
+    printf("program name \"%s\" successfully copied\n",
+           name);
+  } else {
+    printf("copying %s leads to different string %s\n",
+           argv[0], name);
+  }
+}