题解 | #计算三角形的周长和面积#
计算三角形的周长和面积
https://ac.nowcoder.com/acm/problem/21461
#include <iostream>
#include <cmath>
#include <iomanip>
using namespace std;
int main()
{
float a=0;
float b=0;
float c=0;
cin>>a>>b>>c;
float C=a+b+c;
float p=(C)/2;
float S=sqrt(p*(p-a)*(p-b)*(p-c));
cout<<fixed<<setprecision(2)<<
"circumference="<<C<<" "<<
"area="<<S<<endl;
return 0;
}
