1815[Distance]

求两个坐标点的距离- -

主要是输出保证有两个小数点~

 

#include<iostream>#include<cmath>#include <iomanip>using namespace std;int main(){int n;double x1, y1 ,x2, y2;double y;cin >> n;while( n-- ){cin >> x1 >> y1 >> x2 >> y2;y = (x1-x2) * ( x1-x2 ) + (y1-y2) * (y1-y2);y = sqrt( y );cout << setiosflags( ios::fixed ) << setprecision( 2 );cout << y << endl;}return 0;}

 

搞定~

什么时候才能刷题刷成小牛呢[叹气]