I need help with some basics please

Question

Can someone help me please? I am trying to write a very simple program that calculates the fluid requirements for a surgical patient. The formula is as follows. Give 4mL/kg for the first 10kg of weight. Give 2mL/kg for the second 10kg of weight. Give 1mL/kg for every additional kg over the first 20. Here is my code:

Feel free to email me at [e-mail] if you are willing.

#include <iostream>
using namespace std;
int main()
{

int weight=0;
int sum=0,val=0,a=0,b=0,c=0,maintain=0;

    cout << "Calculation of Maintenance Fluids!\n";
    cout<< "Following the 4:2:1 Rule\n\n";

    cout<< "Please enter the patient's weight: " << endl;
    cin>>weight;
    while (cin>>weight){

    cout<<"You entered:"<<weight;  
while(sum<weight) 
        {sum+=1;
    while(sum=10){ 
        a=sum*4;
    }
    while(sum=20){
        b=sum*2;
    }
    while(sum>20){  
        c=weight-20;
    }
        }
        maintain=a+b+c;
    cout<<"The maintenance rate is: "<<maintain;

}

    }

    return 0;
}

This is all I get when I run this code. It asks me for a weight. I enter a weight and press enter. NOTHING happens. If I then enter a second weight and press enter it says "You entered" and then repeats the weight I entered twice. If I enter 40 press enter and then enter 50 it says "you entered:5050

Answer 1

There is a lot happenning inside that code.
You need to paste it into the playground.
Then insert it into this thread.

This is a start.
enter on wieght per line

50 line 1
other wieght line 2