strcpy

src/miniio.c

@@ -9,12 +9,34 @@ int my_strlen(const char *s) {
   return len;
 }
 
+void my_strcpy(char *dest, const char *src) {
+  register int len = 0;
+  while (src[len]) {
+    len++;
+  }
+  len++; // we have a NULL byte
+  for (int i = 0; i < len; i++) {
+    dest[i] = src[i];
+  }
+}
+
 int main() {
   char word[] = "hallo\0"; // not NULL terminated
+  char my_buf[6];
+  char std_buf[6];
 
+  printf("strlen\n");
   printf("word is %d long\n", my_strlen(word));
   printf("word is actually %lu long\n", strlen(word));
-  printf("success: %b", my_strlen(word) == strlen(word));
+  printf("success: %b\n", my_strlen(word) == strlen(word));
+
+  printf("\nstrcpy\n");
+  my_strcpy(my_buf, word);
+  strcpy(std_buf, word);
+  printf("word: \"%s\"\n", word);
+  printf("my_buf: \"%s\"\n", my_buf);
+  printf("std_buf: \"%s\"\n", std_buf);
+  printf("success: %b\n", 0 == strcmp(my_buf, std_buf));
 
   return 0;
 }