大水题
http://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&page=show_problem&problem=996
输出两个数之间差的绝对值
#include<stdio.h>
int main(){
long long a,b;
while(scanf("%ld%ld",&a,&b)!=EOF){
if(a>b)printf("%ld\n",b-a);判断大小,决定输出哪个
else printf("%ld",a-b);
}
return 0;
}