Merge branch 'master' of https://git.ajou.ac.kr/leejangwon/battle_c into master

8.3........3

-#include <stdio.h>
-
-int main()
-{
-	int a;
-	fscanf(stdin, "%d", &a);
-	if (a > 0)
-		fprintf(stderr, "Error: It is positive\n");
-	else
-		fprintf(stderr, "Error: It is negative\n");
-	fprintf(stdout, "Hello, World %-d\n", a);
-	return 0;
-}

input_data

--200

output_data

-Hello, World -200      
-Error: It is negative