题解 | #小乐乐计算函数#

#include <stdio.h>

double three_max(double x, double y, double z);

int main() {
   double a = 0;
   double b = 0;
   double c = 0;
   scanf("%lf %lf %lf", &a, &b, &c);
    // 分母
   double deno = three_max(a, b + c, c) + three_max(a, b, b + c);
   // 分子
   double mol = three_max(a + b, b, c);
   printf("%.2f\n", mol / deno);

   return 0;
}

double three_max(double x, double y, double z)
{
    // 假设x是最大值
    if (x < y)
    {
        double tmp = x;
        x = y;
        y = tmp;
    }
    if (x < z)
    {
        double tmp = x;
        x = z;
        z = tmp;
    }

    return x;
}