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();
}

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