diff --git a/README.md b/README.md
index c558031..ec720d0 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,20 @@
-# c
+#include <stdio.h>
+//fibonacci数列的第n项
+int fibo(int n) {
+ if (n == 1 || n == 2) {
+  return 1;
+ }
+ return fibo(n - 2) + fibo(n - 1);
+}
+int main() {
+ int i;
+ for (i = 1; i <= 20; i++) {
+  printf("%d\t", fibo(i));
+  if (i % 10 == 0) {
+   printf("\n");
+  }
+ }
+}
+
+