输出结果有四个不说，还一个都不对

#include<iostream>
#include<math.h>
using namespace std;
int max(int a,int b) {
   if (a>=b)
   return a;
else if (a<b)
   return b;
}
int max(int a,int b,int c){
   int d;{
   if(a>=b)
   d=a;
   else if(a<b)
   d=b;}
   if(d>=c)
   return d;
   else if(d<c)
   return c;
   }
   double max(double a,double b){
   if (fabs(a-b)>=0.00001)
   return a;
   else if (fabs(a-b)<0.00001)
   return b;
   }
double max(double a,double b,double c){
   double d;{
   if(fabs(a-b)>=0.00001)
   d=a;
   else if(fabs(a-b)<0.00001)
   d=b;}
   if(fabs(d-c)>=0.00001)
   return d;
   else if(fabs(d-c)<0.00001)
   return c;
}
int main(){
   int m,n;
   cin>>m>>n;
   cout<<"the max is "<<max(m,n)<<endl;
   int e,r,t;
   cin>>e>>r>>t;
   cout<<"the max is "<<max(e,r,t)<<endl;
   double y,u;
   cin>>y>>u;
   cout<<"the max is "<<max(y,u)<<endl;
   double i,o,p;
   cin>>i>>o>>p;
   cout<<"the max is "<<max(i,o,p)<<endl;
   return 0;
}