Errors in calculator

[ostrichparty101]

#include <iostream>
#include <fstream>
#include <string>

using namespace std;

float numerator1, denominator1, numerator2, denominator2, answer;


int main (int argc, char *argv[]) {
	//Read picture
	string line;
	ifstream myfile ("/Users/Brad/Desktop/MathScripts/Proportions/Value Finder/picture.txt");
	if (myfile.is_open())
	{
		while (! myfile.eof())
		{
			getline (myfile,line);
			cout << line << endl;
		}
		myfile.close();
	}
	else cout << "Unable to load picture!!!" << endl;
	//Finish reading picture
	
	
	//Start Calculator
	cout << "Hello! Use 0 as the unknown variable." << endl;
	//Start loop
				char loop;
					do{
	cout << "Enter your first ratio:" << endl;
	cin >> numerator1;
	cin >> denominator1;
	cout << "Now your second ratio:" << endl;
	cin >> numerator2;
	cin >> denominator2;
	
	//Formulas
	if(numerator1==0){
		answer = denominator1 * numerator2 / denominator2;
	}
	if(numerator2==0){
		answer = numerator1 * denominator2 / denominator1;
	}
	if(denominator1==0){
		answer = numerator1 * denominator2 / numerator2;
	}
	if(denominator2==0){
		answer = denominator1 * numerator2 / numerator1;
	}
	
	
	//Answer
	if((numerator1>0)&&(denominator1>0)&&(numerator2>0)&&(denominator2>0)){
	    cout << "There is no unknown variable.";
	}else{
	    //Output answer, if one variable is 0
	    cout << "Your unknown variable is " << answer << "!";
	}
			}
	//End Loop, clear console
		cout<< endl <<"Evaluate another ratio? (Y/N)" << endl;
		cin>>loop;
		cout << string(3, '\n' );
		}while(loop=='y'||loop=='Y');
		if(loop=='n'){
			string endline;
				ifstream myfile ("/Users/Brad/Desktop/MathScripts/Proportions/programended.txt");
				if (myfile.is_open())
				{
					while (! myfile.eof())
					{
						getline (myfile,line);
						cout << line << endl;
					}
					myfile.close();
				}
				else cout << "Unable to load picture!!!" << endl;

	}
}

Errors:

Proportions Value Finder.cpp:63:3: error: expected 'while' in do/while loop
                cout<< endl <<"Evaluate another ratio? (Y/N)" << endl;
                ^
Proportions Value Finder.cpp:31:6: note: to match this 'do'
                                        do{
                                        ^
Proportions Value Finder.cpp:66:4: error: expected unqualified-id
                }while(loop=='y'||loop=='Y');
                 ^
Proportions Value Finder.cpp:67:3: error: expected unqualified-id
                if(loop=='n'){
                ^
Proportions Value Finder.cpp:82:1: error: expected external declaration
}
^
4 errors generated.

I'm confused :(

EDIT: Fixed error 4.

[Yanson]

You have an extra } on line 61

[ostrichparty101]

In response to Yason, I now have one error.

Proportions Value Finder.cpp:80:3: error: expected '}'
        }
         ^
Proportions Value Finder.cpp:9:35: note: to match this '{'
int main (int argc, char *argv[]) {
                                  ^
1 error generated.

EDIT: Fixed! Thanks