Help with functions

having issues with learning functions. visual studios keeps saying lines 51-61 have an error with the variable in (). I don't get why it's wrong. Please Help.

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//Going Green Calculator, Designed by James Snook for
//Program is designed to figure out the enviromental benefits 

	#include "stdafx.h"
	#include <iostream>
	#include <iomanip>
	#include <string>

	using namespace std;

// function prototypes
	string info(string& cinfo);
	double papers(double& paper);
	double trees(double& paper, double& tree);
	double treesc(double& paper, double& treec);
	double waters(double& paper, double& water);
	double watersc(double& paper, double& waterc);
	double energys(double& paper, double& energy);
	double energysc(double& paper, double& energyc);
	double pollutions(double& paper, double& pollution);
	double pollutionsc(double& paper, double& pollutionc);
	double landfills(double& paper, double& landfill);
	double landfillsc(double& paper, double& landfillc);
	double totals(double& treec, double& energyc, double& pollutionc, double& landfillc, double& total);
	double file(string& cinfo, double);
	
int main()
{
	// get variables 
	string cinfo;				//client's info
	double paper;				//pounds of paper we shredded for the client
	double tree;				//trees saved
	double treec;				//tree cost
	double water;				//water saved
	double waterc;				//water cost
	double energy;				//kw of energy saved
	double energyc;				//energy cost
	double pollution;			//pounds of pollution saved
	double pollutionc;			//pollution cost
	double landfill;			//cubic yards of landfill space saved
	double landfillc;			//landfill cost
	double total = 0;			//total savings
	bool done;					//bool to check rather or not total is greater than 0.00
	
	
	done = (total > 0);
while (!done)
	{
	cinfo = info(cinfo);
	paper = papers(paper);
	tree = trees(tree);
	treec = treesc(treec);
	water = waters(water);
	waterc = watersc(waterc);
	energy = energys(energy);
	energyc = energysc(energyc);
	pollution = pollutions(pollution);
	pollutionc = pollutionsc(pollutionc);
	landfill = landfills(landfill);
	landfillc = landfillsc(landfillc);
	total = totals(total);
	done = (total > 0);
	}
	
	system("pause");
	return (0);
	}
//***************************************************************************************
	
string info(string& cinfo)
	//Get the amount of paper collected
	{
	string client;				//client's name
	string caddress;			//client's street address
	string ccity;				//client's city
	string cstate;				//client's state
	string czip;				//client's zip code
	string response;			//test if the address is needed
	
 
	cout << "client's name:					";
	cin >> client;
	cout << "Are you sending this to a client?  Y for yes or N for no:  ";
	cin >> response;
	if (response="Y")
	{
		cout << "client's street address:		";
		cin >> caddress;
		cout << "clients city:					";
		cin >> ccity;
		cout << "Clients state:					";
		cin >> cstate;
		cout << "clients zip code:				";
		cin >> czip;
		
		cinfo = client "endl" caddress "endl" ccity ", "	cstate " " zip; 
		}
	else if (response="yes")
	{
		cout << "client's street address:		";
		cin >> caddress;
		cout << "clients city:					";
		cin >> ccity;
		cout << "Clients state:					";
		cin >> cstate;
		cout << "clients zip code:				";
		cin >> czip;
		
		cinfo = client "endl" caddress "endl" ccity ", "	cstate " " zip; 
		}
		else if (response="Yes")
	{
		cout << "client's street address:		";
		cin >> caddress;
		cout << "clients city:					";
		cin >> ccity;
		cout << "Clients state:					";
		cin >> cstate;
		cout << "clients zip code:				";
		cin >> czip;
		
		cinfo = client "endl" caddress "endl" ccity ", "	cstate " " zip; 
		}
		else if (response="YEs")
	{
		cout << "client's street address:		";
		cin >> caddress;
		cout << "clients city:					";
		cin >> ccity;
		cout << "Clients state:					";
		cin >> cstate;
		cout << "clients zip code:				";
		cin >> czip;
		
		cinfo = client "endl" caddress "endl" ccity ", "	cstate " " zip; 
		}
			else if (response="YES")
	{
		cout << "client's street address:		";
		cin >> caddress;
		cout << "clients city:					";
		cin >> ccity;
		cout << "Clients state:					";
		cin >> cstate;
		cout << "clients zip code:				";
		cin >> czip;
		
		cinfo = client "endl" caddress "endl" ccity ", "	cstate " " zip; 
		}
			else if (response="yES")
	{
		cout << "client's street address:		";
		cin >> caddress;
		cout << "clients city:					";
		cin >> ccity;
		cout << "Clients state:					";
		cin >> cstate;
		cout << "clients zip code:				";
		cin >> czip;
		
		cinfo = client "endl" caddress "endl" ccity ", "	cstate " " zip; 
		}
				else if (response="yeS")
	{
		cout << "client's street address:		";
		cin >> caddress;
		cout << "clients city:					";
		cin >> ccity;
		cout << "Clients state:					";
		cin >> cstate;
		cout << "clients zip code:				";
		cin >> czip;
		
		cinfo = client "endl" caddress "endl" ccity ", "	cstate " " zip; 
		}
				else if (response="yEs")
	{
		cout << "client's street address:		";
		cin >> caddress;
		cout << "clients city:					";
		cin >> ccity;
		cout << "Clients state:					";
		cin >> cstate;
		cout << "clients zip code:				";
		cin >> czip;
		
		cinfo = client "endl" caddress "endl" ccity ", "	cstate " " zip; 
		}
					else if (response="YeS")
	{
		cout << "client's street address:		";
		cin >> caddress;
		cout << "clients city:					";
		cin >> ccity;
		cout << "Clients state:					";
		cin >> cstate;
		cout << "clients zip code:				";
		cin >> czip;
		
		cinfo = client "endl" caddress "endl" ccity ", "	cstate " " zip; 
		}
					else if (response="y")
	{
		cout << "client's street address:		";
		cin >> caddress;
		cout << "clients city:					";
		cin >> ccity;
		cout << "Clients state:					";
		cin >> cstate;
		cout << "clients zip code:				";
		cin >> czip;
		
		cinfo = (client "endl" caddress "endl" ccity ", " cstate " " zip); 
		}

		else if (response="n")
		{
		cinfo = client;
		}
		else if (response="no")
		{
		cinfo = client;
		}
		else if (response="NO")
		{
		cinfo = client;
		}
		else if (response="No")
		{
		cinfo = client;
		}
		else if (response="nO")
		{
		cinfo = client;
		}
		else if (response="N")
		{
		cinfo = client;
		}
		
			else
			{
			cout << "please enter Y for Yes or N for NO.  How hard is that?";
			}
	
	
	return (cinfo);
	}
	
//***************************************************************************************
	
double papers(double& paper)
	//Get the amount of paper collected
	{
	
	cout << "Pounds of paper collected:		";
	cin >> paper;
	
	return (paper);
	}
	
//***************************************************************************************
double trees(double& paper, double& tree)
{
	tree = ((paper)/17);

	return(tree);
}

//***************************************************************************************
double treesc(double& paper, double& treec)
{

treec = ((paper)/250);

	return(treec);
}

//***************************************************************************************
	double waters(double& paper, double& water)
	{
	water = ((paper)/7000);
	
	return(water);
	}
	
//***************************************************************************************
	double watersc(double& paper, double& waterc)
	{
	waterc = ((paper)/(.0045 * 7000));
	
	return(waterc);
	}
	
//***************************************************************************************
	double energys(double& paper, double& energy)
	{
	energy = ((paper)/4100);
	
	return(energy);
	}
	
Code continuation
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//***************************************************************************************
	double energysc(double& paper, double& energyc)
	{
	energyc = ((paper)/(.08 * 7000));
	
	return(energyc);
	}
	
//***************************************************************************************
	double pollutions(double& paper, double& pollution)
	{
	pollution = ((paper)/(60));
	
	return(pollution);
	}	
	
//***************************************************************************************
	double pollutionsc(double& paper, double& pollutionc)
	{
	pollutionc = ((paper)/(5));
	
	return(pollutionc);
	}	
	
//***************************************************************************************
	double landfills(double& paper, double& landfill)
	{
	landfill = ((paper)/(5));
	
	return(landfill);
	}
	
//***************************************************************************************
	double landfillsc(double& paper, double& landfillc)
	{
	landfillc = ((paper)/(50));
	
	return(landfillc);
	}
	
//***************************************************************************************
	double totals(double& treec, double& energyc, double& pollutionc, double& landfillc, double& total)
	{
	total = (treec + energyc + pollutionc + landfillc);
	
	return(total);
	}
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