Division of Nlogonia

http://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&page=show_problem&problem=2493 判断输入坐标在哪个方位，建立坐标系，关键是与 坐标原点比较

#include<stdio.h>

int main(){

    int h,z,t,a,b;

    while(scanf("%d",&t)!=EOF){

    if(t==0)break；

     scanf("%d%d",&a,&b);

              while(t--){

    scanf("%d%d",&h,&z);

            if(h<a&&z>b) printf("NO\n");

    else if(h>a&&z>b)printf("NE\n");

    else if(h>a&&z<b)printf("SE\n");

    else if(h<a&&z<b)printf("SO\n");

    else printf("divisa\n");

    } }

    return 0;

}