杭电ACM2057--A + B Again

这是题目 A + B Again

这是源代码：

#include <stdio.h>
int main()
{
	__int64 a,b;
	while (scanf("%I64X %I64X",&a,&b)!=EOF)
	{
		if (a+b>=0)
			printf("%I64X
",a+b);
		else
			printf("-%I64X
",0xFFFFFFFFFFFFFFFF-(a+b)+1);
	}
	return 0;
}

/*

0xFFFFFFFFFFFFFFFF-(a+b)+1
#include <stdio.h>
int main (  )
{
 __int64 a, b;
 while ( scanf( "%I64X %I64X", &a, &b ) != EOF )
 {
  b += a;
  if ( b < 0 )
  {
   b = -b;
   a = '-';
        }
  else
   a = 0;
  if ( a)
   putchar ( a );
  printf ( "%I64X
", b );
 }
 return 0;
}*/

刚开始提交一直错误，后来才明白是我的数据定义有点小。需要__int64才够，所以这样才提交正确。坚持就是胜利。