MLE???

di17863468973 @ 2024-12-30 22:19:44

#include<bits/stdc++.h>
using namespace std;
double p(double x1,double y1,double x2,double y2){
    sqrt((x2-x1)*(x2-x1)+(y2-y1)*(y2-y1));
}
int main(){
    double C=0,a[3],b[3];
    for(int i=1;i<=3;i++){
        cin>>a[i]>>b[i];
    if(i==3){
        C+=(p(a[1],a[2],b[1],b[2])+p(a[2],a[3],b[2],b[3])+p(a[1],a[3],b[1],b[3]));
    }
    }
    printf("%lf.2",C);
    return 0;
}

by _Vistion_ @ 2024-12-30 22:32:32

你的函数p没有返回值

by _Vistion_ @ 2024-12-30 22:34:33

改成return sqrt((x2-x1)*(x2-x1)+(y2-y1)*(y2-y1));试试

by _Vistion_ @ 2024-12-30 22:35:42

a,b数组建议开大点，不够

by di17863468973 @ 2024-12-31 21:49:24

@Vistion 现在好了 只不过全WA了

by _Vistion_ @ 2025-01-01 07:11:21

@di17863468973

调好了

#include<bits/stdc++.h>
using namespace std;
double p(double x1,double y1,double x2,double y2){
    return sqrt(abs(x2-x1)*abs(x2-x1)+abs(y2-y1)*abs(y2-y1));
}
int main(){
    double C=0,a[10],b[10];
    for(int i=1;i<=3;i++)
        cin>>a[i]>>b[i];
    C+=(p(a[1],b[1],a[2],b[2])+p(a[2],b[2],a[3],b[3])+p(a[1],b[1],a[3],b[3]));
    printf("%.2lf",C);
    return 0;
}