#include<bits/stdc++.h> using namespace std; double a,b,c; double baron(double a,double b,double c){ double p=(a+b+c)/2.0; return sqrt(p*(p-a)(p-b)(p-c)); } int main(){ cin>>a>>b>>c; printf("%.2f",baron(a,b,c)); return 0; }

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我不会

| 1 | 4 | |--2-|--5-| | 3 | 6 |

#include<iostream> #include<cmath> using namespace std; double area(double a,double b,double c){ double p=0.5*(a+b+c); return sqrt(p*(p-a)(p-b)(p-c)); } int main(){ double a=0,b=0,c=0; cin>>a>>b>>c; printf("%.2lf",area(a,b,c)); }

2024/2/1 22:21

看完好用的点一个赞

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

#include <iostream> #include <cmath> #include <cstdio> using namespace std; double area(double a,double b,double c){ double p=(a+b+c)/2.0; return sqrt(p*(p-a)(p-b)(p-c)); } int main() { double a,b,c; cin>>a>>b>>c; printf("%.2f",area(a,b,c)); return 0; }