hdu 1057 A + B Again

A + B Again

• Problem Description

  There must be many A + B problems in our HDOJ , now a new one is coming.
  
  Give you two hexadecimal integers , your task is to calculate the sum of them,and print it in hexadecimal too.
  
  Easy ? AC it !

• Input

  The input contains several test cases, please process to the end of the file.
  
  Each case consists of two hexadecimal integers A and B in a line seperated by a blank.
  
  The length of A and B is less than 15.

• Output

  For each test case,print the sum of A and B in hexadecimal in one line.

• Sample Input

  +A -A
  
  +1A 12
  
  1A -9
  
  -1A -12
  
  1A -AA

• Sample Output

  0
  
  2C
  
  11
  
  -2C
  
  -90

题意：

给两个16进制的数，计算两数和

代码如下：

#include<stdio.h>
int main(void)
{
    __int64 a, b;
    while(scanf("%I64x%I64X", &a, &b) != EOF)
        printf(a+b<0?"-%I64X\n":"%I64X\n", a+b<0?-a-b:a+b);
    return 0;
}