diff --git a/c-basic/foo.c b/c-basic/foo.c
deleted file mode 100644
index b99fb4f..0000000
--- a/c-basic/foo.c
+++ /dev/null
@@ -1,7 +0,0 @@
-#include <stdio.h>
-#include "foo.h"
-
-int foo() {
-    printf("I am foo\n");
-    return 0;
-}
diff --git a/c-basic/foo.h b/c-basic/foo.h
deleted file mode 100644
index 4ec598a..0000000
--- a/c-basic/foo.h
+++ /dev/null
@@ -1,6 +0,0 @@
-#ifndef FOO_H
-#define FOO_H
-
-int foo();
-
-#endif
diff --git a/c-basic/main.c b/c-basic/main.c
index a6606cc..a581bdd 100644
--- a/c-basic/main.c
+++ b/c-basic/main.c
@@ -1,11 +1,8 @@
-#include "myprint.h"
+#include <stdio.h>
 
 int main() {
 
-  myprint();
-
-  return 0;
+  printf("hello world year 2025 !\n");
 
+  return 0;\
 }
-
-
diff --git a/c-basic/myprint.c b/c-basic/myprint.c
deleted file mode 100644
index 5945aa2..0000000
--- a/c-basic/myprint.c
+++ /dev/null
@@ -1,13 +0,0 @@
-#include <stdio.h>
-#include "myprint.h"
-
-int myprint() {
- 
-  int a = 10, b = 20;
-
-  printf("a = %d, b = %d\n", a, b);
-  printf("a = %d, b = %d\n", b, a);
-  printf("%d%d\n", a, b);
-
-  return 0;
-}
diff --git a/c-basic/myprint.h b/c-basic/myprint.h
deleted file mode 100644
index 9fcc774..0000000
--- a/c-basic/myprint.h
+++ /dev/null
@@ -1,6 +0,0 @@
-#ifndef MYPRINT_H
-#define MYPRINT_H
-
-int myprint();
-
-#endif