样例过了...然后全部WA

AT1198_100 @ 2020-05-13 13:43:44

#include<bits/stdc++.h>
using namespace std;
int main(){
    double a,b,c,d,e,f;
    cin>>a>>b>>c>>d>>e>>f;
    int x,y,z;
    x=sqrt((c-a)*(c-a)+(d-b)*(d-b));
    y=sqrt((e-c)*(e-c)+(f-d)*(f-d));
    z=sqrt((e-a)*(e-a)+(f-b)*(f-b));
    cout<<fixed<<setprecision(2)<<x+y+z;
    return 0;
}

by kjy_ttcl @ 2020-05-13 13:45:28

@winterzxy 谁让你用int了？

by iMya_nlgau @ 2020-05-13 13:46:12

x,y,z 应该用double类型

by iMya_nlgau @ 2020-05-13 13:46:18

@winterzxy

by xhQYm @ 2020-05-13 13:46:30

改成这样：

#include<bits/stdc++.h>
using namespace std;
int main(){
    double a,b,c,d,e,f;
    cin>>a>>b>>c>>d>>e>>f;
    double x,y,z;
    x=sqrt((c-a)*(c-a)+(d-b)*(d-b));
    y=sqrt((e-c)*(e-c)+(f-d)*(f-d));
    z=sqrt((e-a)*(e-a)+(f-b)*(f-b));
    cout<<fixed<<setprecision(2)<<x+y+z;
    return 0;
}

by kjy_ttcl @ 2020-05-13 13:46:50

@qym2008 他xyz用的是int，输出的是整数，肯定不行

by xhQYm @ 2020-05-13 13:47:14

@kangjiayuan 刚刚我看错了，抱歉qwq

by AT1198_100 @ 2020-05-13 13:48:11

@Sapphire6575737973 谢谢

by kjy_ttcl @ 2020-05-13 13:48:19

不过直接用printf("%.2f)不是更方便吗？

by WanderingTrader @ 2020-05-13 14:46:39

@kangjiayuan 有的C++党就是想用setprecision

by kjy_ttcl @ 2020-05-13 14:49:59

@zycany 我谔谔