题解 | #小乐乐计算函数#

float max3(float a,float b,float c){
    float x=0,y=0;;
    x=a>b?a:b;
    y=b>c?b:c;
    return x>y?x:y;
}
int main(){
    float m=0,a=0,b=0,c=0;
    scanf("%f%f%f",&a,&b,&c);
    m=max3(a+b,b,c)/(max3(a,b+c,c)+max3(a,b,b+c));
    printf("%.2f",m);
    return 0;
}