杭电acm水题，竟然也纠结了半天

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 A+B in decimal number in one line；

input

1 9A Ba b

output

102121

代码如下

#include<stdio.h>


int main(void) {
int a,b;
while(scanf("%x %x",&a,&b) != EOF) {
printf("%d\n",a+b);
}
return 0;
}