0分……

Kyleshao @ 2023-01-13 11:23:51

#include <bits/stdc++.h>
using namespace std;
struct zuobiao
{
    int x,y;  
};
double suan(int d1,int e1,int d2,int e2)
{
    return sqrt((d2-d1)*(d2-d1)+(e2-e1)*(e2-e1));
}
zuobiao a[3];
int main()
{
    for (int i=1;i<=3;i++)
    {
        cin>>a[i].x>>a[i].y;
    }
    int a1=suan(a[1].x,a[2].x,a[1].y,a[2].y);
    int a2=suan(a[1].x,a[3].x,a[1].y,a[3].y);
    int a3=suan(a[2].x,a[3].x,a[2].y,a[3].y);
    printf("%.2f\n",a1+a2+a3);
    return 0;
}

by WA_sir @ 2023-01-13 11:29:41

@Kyleshao 把 int 改成 double 试试

by Eleveslaine @ 2023-01-13 11:31:05

@Kyleshao

坐标均为实数且绝对值不超过 100，小数点后最多仅有 3 位。

输入不一定是整数。

by Kyleshao @ 2023-01-13 11:35:01

@Franz_Liszt

#include <bits/stdc++.h>
using namespace std;
struct zuobiao
{
    double x,y;  
};
double suan(int d1,int e1,int d2,int e2)
{
    return sqrt((d2-d1)*(d2-d1)+(e2-e1)*(e2-e1));
}
zuobiao a[3];
int main()
{
    for (int i=1;i<=3;i++)
    {
        cin>>a[i].x>>a[i].y;
    }
    bool a1=suan(a[1].x,a[2].x,a[1].y,a[2].y);
    bool a2=suan(a[1].x,a[3].x,a[1].y,a[3].y);
    bool a3=suan(a[2].x,a[3].x,a[2].y,a[3].y);
    printf("%.21f\n",a1+a2+a3);
    return 0;
}

还是0分

by Eleveslaine @ 2023-01-13 11:35:50

@Kyleshao 您 suan 函数参数也没改成 double 啊

by Eleveslaine @ 2023-01-13 11:36:38

等等，参数都是乱的

by Eleveslaine @ 2023-01-13 11:41:41

@Kyleshao 啊啊啊这代码好乱啊
以下代码可以AC

#include <bits/stdc++.h>
using namespace std;
struct zuobiao
{
    double x,y;  
};
double suan(double d1,double e1,double d2,double e2)
{
    return sqrt((d2-d1)*(d2-d1)+(e2-e1)*(e2-e1));
}
zuobiao a[4];
int main()
{
    for(int i=1;i<=3;i++)
    {
        cin>>a[i].x>>a[i].y;
    }
    double a1=suan(a[1].x,a[1].y,a[2].x,a[2].y);
    // 开什么bool啊，double好吧
    double a2=suan(a[1].x,a[1].y,a[3].x,a[3].y);
    double a3=suan(a[2].x,a[2].y,a[3].x,a[3].y);
    printf("%.2lf\n",a1+a2+a3);
    // %.2lf 不是 %.21f（字母l不是数字1）
    return 0;
}