need help

[blamp]

Im writing a fraction calculator program I finished the program but keep getting an error on the do while function. can someone help

heres the program

#include <iostream>  
#include <iomanip>  
#include <cmath>
 
using namespace std;    // Internal storage 
 
int choice;    
int num1;      
int denom1;      
int num2;    
int denom2;    
int calcden;    
int calcnum;      
 
void menuFunction(void)
{
  int denominator1, numerator1,denominator2, numerator2;
  char operation;
  cout<<"This program will agther your input, and perform mathematical operations on fractions. you will be prompted to enter a denominator and numerator for two fractions, and hen will be asked to enter an operation you wish to perform"<<endl;
  cout<<"Please enter the first numerator"<<endl;
  cin>>numerator1;
  cout<<"Please enter the first denominator"<<endl;
  cin>>denominator1;
  cout<<"Please enter the second numerator"<<endl;
  cin>>numerator1;
  cout<<"Please enter the second denominator"<<endl;
  cin>>denominator2;
  cout<<"You may choose aadition (+), subtraction (-), multiplication (*) or division (/)...please choose an operation:"<<endl;
 cin>>operation;
 //perform error checking, call other functions, etc...
}
 
void add()    
{
calcnum=num1*denom2 + denom1*num2;    
calcden=denom1*denom2;    
}
void subtract()        
{
    calcnum=num1*denom2-(denom1*num2);  
    calcden=calcden=denom1*denom2;  
}
 
void multiply()        
{
    calcnum= num1*num2;      
    calcden=denom1 * denom2;      
}
 
void divide()        
{
    calcnum= num1*denom2;      
    calcden=denom1 * num2;      
}
void exit()      
{
    cout<<"Have a nice day. ";      
}
 
void main()        
{
 
do while(choice!='5')
 {
    cout<<"Enter a number from the menu: ";    
    cin >> choice;
    menu();        
    cout<< "Enter the firts numerator: ";    
    cin >>num1;      
    cout<< "Enter the firts denomerator: ";  
    cin>>denom1;    
cout<< "Enter the second numerator: ";
cin>>num2;    
cout<< "Enter the second numerator: ";    
cin>>denom2;    
cout<<calcnum<<" /"<<calcden;      
}
 
}

[boxfish]

It's not

do while (choice != '5')
{
    // ...
}

It goes like

do
{
    // ...
} while (choice != '5');

Hope this helps.

[JosAH]

Possibly you mean 'while (choice != 5)' (skip that 'do') but there is a lot more wrong:

1) menu() is not a function; menuFunction() is but you only call it after the user
had to make a (blind) choice.
2) you ask the user for a second numerator but you assign it to the first numerator.

Fix those errors first, test it and see what happens.

kind regards,

Jos