C programming - segmentation fault (core dump)

#include <stdio.h>
#include <stdlib.h>

void print(FILE*, int);

int main(int argc, char** argv)
{
    FILE *output;
    if ((output = fopen("output.txt", "w")) == NULL)
    {
        printf("cannot open the file input\n");
        exit(EXIT_FAILURE);
    }

    int data = 1;
    do
    {
        scanf("%d", &data);
        print(output, data);
    } while (data > 0);

    fclose(output);
    return 0;
}
void print(FILE* output, int data)
{
    fprintf(output, "%d\n", data);
}