writing a table in a file

 #include<stdio.h>

int main()

{

    FILE *ptr;

    ptr=fopen("table.txt","w");

    int n;

    printf("enter n:\n");

    scanf("%d",&n);

    for(int i=1;i<=10;i++)

    {

        fprintf(ptr,"%d x %d=%d\n",n,i,n*i);

    }

    fclose(ptr);

    return 0;

}