题解 | #计算三角形的周长和面积#

知识点：运算

#include <iostream>
#include <cmath>
#include <iomanip>
using namespace std;

int main() {
    int a = 0;
    int b = 0;
    int c = 0;
    float circumference = 0.0;
    float area = 0.0;
    float p = 0.0;

    cin >> a >> b >> c;

    circumference = a + b + c;
    p = circumference / 2;
    area = sqrt(p * (p - a) * (p - b) * (p - c));

    cout << fixed << setprecision(2);
    cout << "circumference=" << circumference << " area=" << area << endl;

    return 0;
}