#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <stdlib.h>
int main(void)
{
FILE * fp;
fp = fopen("sales.txt", "a");
fprintf(fp, "2017.3.1 ¸ÅÃâ: %d \n", 200000);
fclose(fp);
return 0;
}