diff --git "a/2109020142/chapter1/\345\256\236\351\252\2141" "b/2109020142/chapter1/\345\256\236\351\252\2141"
new file mode 100644
index 0000000000000000000000000000000000000000..0cfc02c543efc2da335ad1264cbbad6269f81f88
--- /dev/null
+++ "b/2109020142/chapter1/\345\256\236\351\252\2141"
@@ -0,0 +1,12 @@
+#include<stdio.h>
+int main()
+{
+    int i,n,sum;
+    scanf("%d",&n);
+    for(i=1;i<=n;i++)
+    {
+    sum=sum+i;
+    } 
+    printf("sum=%d",sum);
+    return 0;
+}
\ No newline at end of file