diff --git a/num.c b/num.c
index 1222ec7..240dfe2 100644
--- a/num.c
+++ b/num.c
@@ -1,7 +1,9 @@
 #include <stdio.h>
+#include<conio.h> // added new headerfile
 
-int main() {
+void main() {
     int num1, num2, sum;
+clrscr(); // for clearing the output screen
     
     printf("Enter the first number: ");
     scanf("%d", &num1);
@@ -9,9 +11,9 @@ int main() {
     printf("Enter the second number: ");
     scanf("%d", &num2);
     
-    sum = num1 + num3;
+    sum = num1 + num2;
     
     printf("The sum of %d and %d is %d.", num1, num2, sum);
     
-    return 0;
+    getch();
 }