C语言中十六进制数据的输入与转换

故事要从一道题目说起~~~~~~~~

G - A+B Coming

Many classmates said to me that A+B is must needs.
If you can’t AC this problem, you would invite me for night meal. ^_

Input

Input may contain multiple test cases.Each case contains A and B in one line.
A, B are hexadecimal number.
Input terminates by EOF.

Output

Output A+B in decimal number in one line.

Sample Input

1 9
A B
a b

Sample Output

10
21
21

题目要求输入两个十六进制的数，然后以十进制输出他们的和。
在 C 语言中 ，我们可以使用 Scanf / Printf 函数来完成 输入 / 输出
十分简单，代码如下