diff --git a/ChangeLog b/ChangeLog
index 34aee9c..d03d742 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,9 @@
 2024-10-29  Mert Gör  <mertgor@masscollabs.xyz>
 
+	* c-basic/C.pdf: return value page 22
+
+	* c-basic/abc.c: add a and b double numbers from scanf 
+
 	* c-basic/C.pdf: page 21 question/work
 
 	* c-basic/d-f.c: #include <stdio.h>
diff --git a/c-basic/abc.c b/c-basic/abc.c
new file mode 100644
index 0000000..7089e5e
--- /dev/null
+++ b/c-basic/abc.c
@@ -0,0 +1,18 @@
+#include <stdio.h>
+
+int main()
+{
+  double a,b,c;
+
+  printf("enter a number \n");
+  scanf("%lf", &a);
+
+  printf("enter b number \n");
+  scanf("%lf", &b);
+
+  c = a + b;
+  
+  printf("your result and also c number is : %f\n", c);
+
+  return 0;
+}