Program 14

[pacman169]

Getting error when trying to compile a program that converts yen, euros and pounds into dollars.

  #include<iostream>
#include<string>
#include<algorithm>
#include<cmath>

using namespace std;

int main()

constexpr double  yen to dollar=2.3;
constexpr double euro to dollar=1.38;
constexpr double pound to dollar=0.6;

double yens=1;
double euros=1;
double pounds=1;
string unit;
unit=pound or yen or euro;

cout<<"Please choose if you would like to convert yens,euros or pounds into dollars";
cin>>yen>>euro>>pound>>unit;
cout<<"How many << unit << you would like to convert?";
cin>>unit;

if(unit == yen)
           cout <<yen<< "dollars == "<<yen to dollar*yen<<"dollars\n";

else if (unit == euro)
           cout<<euro<<"dollars == "<<euro to dollar*euro<<"dollars\n";

else if (unit == euro)
           cout<<euro<<"dollars == "<<euro to dollar*euro<<"dollars\n";
   else
           cout<<"Sorry, I don`t know a unit called ' "<<unit<<" '\n";

}

[a k n]

Now that's too much , you've been asking for help in every exercise .( and that too mostly simple syntactical errors and problems because you don't understand the concept well.)

This is what you need.
http://www.cplusplus.com/doc/tutorial/
http://learncpp.com/
First learn the language and then solve those exercises.

[pacman169]

I have been reading a book, so why to change tack by sudden to online tutorials?

I admit that in the above code I make basic mistakes and tried to fix it up. I don`t have answers to those exercises. Here is the code improved but still does not compile:

 #include<iostream>
#include<string>
#include<algorithm>
#include<cmath>

using namespace std;

int main()

constexpr double  yens_in_dollar=2.3;
constexpr double euros_in_dollar=1.38;
constexpr double pounds_in_dollar=0.6;

double number=1;         // number in yens,euros or pounds
string value;           //  Specifies a string called value
value= " ";


cout<<"Please choose what value (yen,euro or pound) would you like to change into dollars and choose number";
cin>>number>>value;


if(value == "yen")
           cout <<number<<"yens == "<<yens_in_dollar*number<<"dollars\n";

else if (value == "euro")
           cout<<number<<"euros == "<<euros_in_dollar*number<<"dollars\n";

else if (value == "pound")
           cout<<number<<"pounds == "<<pounds_in_dollar*number<<"dollars\n";
   else
           cout<<"Sorry, I don`t know a value called " <<value<< "\n";

}

      

[wildblue]

You're missing an opening { on the main function.

[a k n]

Well, I didn't knew you were reading a book , but anyway I was in the impression that your basics aren't clear yet ,
not to be sound discouraging. My point is that you didn't try too hard and quickly posted it here , while you solved those small issues yourself in a few minutes that won't help anyone if you give up too soon , look again at the chapters , examples ...
Recheck each statements and line , programming is not easy , you have to keep patience and with time , you will learn the compiler's error messages and figure things yourself but don't give up on every small issue and try figuring things yourself.

Best of luck

[pacman169]

Ok thanks wildblue and a k n.

I will try to keep that in mind. I should only post here if I have checked again and again for those simple errors..

Now my program is behaving OK not sure if I did everything right but at least close.