View Code of Problem 24

#include <iostream>
#include <iomanip>
#include <cmath>

using namespace std;
int main( )
{
    int a;
    int b;
    int c;

    cin >> a>> b>> c;
    double p=(a+b+c)/2.0;
    double d=p*(p-a)*(p-b)*(p-c);
    double s=sqrt(d);

    cout <<fixed <<setprecision (2) << s<< endl;

    return 0;
}

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