A35554. include<iostream>#include<cmath>using namespace std; double f(double a,double b,double c){ double s=(a+b+c)/2; return sqrt(s*(s-a)*(s-b)*(s-c));} int main(){ cout.flags(ios::fixed); cout.precision(4)…

include<iostream>

#include<cmath>

using namespace std;

double f(double a,double b,double c){

    double s=(a+b+c)/2;

    return sqrt(s*(s-a)*(s-b)*(s-c));

}

int main(){

    cout.flags(ios::fixed);

    cout.precision(4);

    int a,b,c;

    cin>>a>>b>>c;

    cout<<f(a,b,c)<<endl;

    return 0;

}

假设输入的所有数都为不超过1000的正整数

当输入为“2 2 2”时，输出为“1.7321”（     ）