1 files changed, 6 insertions, 0 deletions
diff --git a/wk4/lect/copy.c b/wk4/lect/copy.c
index 4d442c5..a9ddd33 100644
--- a/wk4/lect/copy.c
+++ b/wk4/lect/copy.c
@@ -7,6 +7,10 @@
 int main(void)
 {
     char *s = get_string("s: ");
+    if (s == NULL)
+    {
+        return 1;
+    }
 
     char *t = malloc(strlen(s) + 1);
     if (t == NULL)
@@ -14,6 +18,8 @@ int main(void)
         return 1;
     }
 
+    strcpy(t,s); // copies a string s to a new string t
+
     for (int i = 0, n = strlen(s); i <= n; i++)
     {
         t[i] = s[i];