题解 | #小乐乐计算函数#

#include <iostream>
#include <iomanip>

using namespace std;

int max3(int a, int b, int c)
{
    if (a >= b&& a >= c)
    {
        return a;
    }
    else if (b >= a&& b >= c)
    {
        return b;
    }
    else if (c >= a&& c >= b)
    {
        return c;
    }
    return 0;
}

int main()
{
    int a, b, c;
    double result;
    cin >> a >> b >> c;
    result = 1.0 * max3((a + b), b, c) / (max3(a, (b + c), c) + max3(a, b, (b + c)));
    cout << fixed << setprecision(2) << result << endl;
    return 0;
}