diff --git a/C/program-2/program.c b/C/program-2/program.c
index eaae4e69..414b2e8e 100644
--- a/C/program-2/program.c
+++ b/C/program-2/program.c
@@ -15,15 +15,15 @@ return 1;
 int main() /*main function */
 {
     int n;
-    printf("enter the number");
+    printf("Enter the number:");
     scanf("%d",&n);
     if(isprime(n)==0)
     {
-        printf(" not prime");
+        printf("%d is not prime number.",n);
     }
     else if(isprime(n)==1)
     {
-        printf("prime");
+        printf("%d is a prime number.",n);
     }
     return 0;
-    }
+}
diff --git a/C/program-25/a.out b/C/program-25/a.out
deleted file mode 100755
index 83930e91..00000000
Binary files a/C/program-25/a.out and /dev/null differ
diff --git a/C/program-25/readme.txt b/C/program-25/readme.txt
new file mode 100644
index 00000000..5519cbfa
--- /dev/null
+++ b/C/program-25/readme.txt
@@ -0,0 +1,6 @@
+This program is to print the number of *. Example if user enter 5. Then it'll print
+*
+**
+***
+****
+*****