样例输出正确，但是零分

EkSulfur @ 2023-08-16 21:29:58

#include<stdio.h>
#include<math.h>
double dis(double x,double y,double u,double v);
int main(void){
    double x[3],y[3];
    double l;
    for(int i=0;i<3;i++){
        scanf("%lf%lf",&x[i],&y[i]);
    }
    l=dis(x[0],y[0],x[1],y[1])+dis(x[0],y[0],x[2],y[2])+dis(x[1],y[1],x[2],y[2]);
    printf("%.2lf",l);

    return 0;
}
double dis(double x,double y,double u,double v){
    int ans=sqrt(pow(x-u,2)+pow(y-v,2));
    return ans;
}

by KarmaticEnding @ 2023-08-16 21:47:56

《int ans》

by KarmaticEnding @ 2023-08-16 21:49:23

@EkSulfur

由于sqrt()返回double型，所以int ans是错误的，应该改成double ans

by KarmaticEnding @ 2023-08-16 21:51:08

#include<bits/stdc++.h>
using namespace std;
double dis(double x,double y,double u,double v);
int main(){
    double x[3],y[3];
    double l;
    for(int i=0;i<3;i++){
        cin>>x[i]>>y[i];
    }
    l=dis(x[0],y[0],x[1],y[1])+dis(x[0],y[0],x[2],y[2])+dis(x[1],y[1],x[2],y[2]);
    printf("%.2f",l);

    return 0;
}
double dis(double x,double y,double u,double v){
    double ans=sqrt(pow(x-u,2)+pow(y-v,2));
    return ans;
}

AC代码

by EkSulfur @ 2023-08-16 21:51:28

@light_dream 谢谢指正