Sum of an Array stored in data.txt

#include<stdio.h>
int main()
{

    int limit, i ,n, sum=0;
    FILE *fp;
    fp = fopen("C:\\DATA.TXT","w");

    printf("Enter number of elements: ");
    scanf("%d",&limit);
    printf("Enter %d elements:-\n",limit);
    for(i=0;i<limit;i++)
    {
        scanf("%d",&n);
        putw(n,fp);

    }fclose(fp);

    fp=fopen("c:\\Data.txt","r");
    while((n=getw(fp))!=EOF)
        sum+=n;
    printf("Sum = %d",sum);
    fclose(fp);

    return 0;
}