/* Writing a text file. */
#include <stdio.h>

int main()
{
    FILE *ptr_file;
    int x;

    ptr_file = fopen("output.txt", "w");

    if (!ptr_file)
        return 1;

    for (x = 1; x <= 10; x++)
    {
        fprintf(ptr_file,"%d\n", x);
    }

    fclose(ptr_file);

    return  0;
}