Write Number in File Calculate Total

#include<stdio.h>

#include<conio.h>

void main()

{

          FILE *fp1;

          int i,num,total=0,n;

          clrscr();

          fp1=fopen("n1.txt","w");

          printf("\n Enter How Many number U Want To Store : ");

          scanf("%d",&n);

          for(i=1;i<=n;i++)

          {

                   printf("\n Enter Number : ");

                   scanf("%d",&num);

                   putw(num,fp1);

          }

            fclose(fp1);

          fp1=fopen("n1.txt","r");

          printf("\n Content of file \n");

          while((num=getw(fp1))!=EOF)

          {

                   printf("\n %4d",num);

                   total=total+num;

          }

          printf("\n Total = %d ",total);

          fclose(fp1);

          getch();

}