diff --git a/hello_world/Hello_world_2021/a.exe b/hello_world/Hello_world_2021/a.exe
new file mode 100644
index 0000000..8deee36
Binary files /dev/null and b/hello_world/Hello_world_2021/a.exe differ
diff --git a/hello_world/Hello_world_2021/hello.c b/hello_world/Hello_world_2021/hello.c
new file mode 100644
index 0000000..f04f81d
--- /dev/null
+++ b/hello_world/Hello_world_2021/hello.c
@@ -0,0 +1,6 @@
+#include<stdio.h>
+int main(int argc, char const *argv[])
+{
+    printf("hello world");
+    return 0;
+}