#include <stdio.h>

int main(void)
{
	FILE* fp;
	int i, s;

	fp = fopen("testdata3.txt", "w");

	s = 0;
	for (i=1; i<=100; i++) {
		s += i;
		fprintf(fp, "%d\n", s);
	}

	fclose(fp);

	return 0;
}