C++ Program Help

[prolemur]

I am trying to make a program that will let one user enter a name and the other player no knowing the name will hav to guess it. I have written this program before, but in a different language. I am getting the errors saying my variables are ambiguous and that the operators I'm using don't exist. Thanks for the help, I don't think it should be too hard to solve.

#include <iostream>using namespace std;string name;string guess;int count = 0;int main() {	cout << "Enter a name for the other player to guess";	cin >> name;	system("cls");	while (count < 10) {		cout << "Enter your guess for the name";		cin >> guess;		if (guess == name) {			cout << "Congratulations you guessed the name, without cheating...!";			break;		}		else {			count ++;		}	}	return 0;}

[alpenwasser]

If I leave out the system("cls"); line, it compiles fine for me and

works (compiler: g++, using Linux)

[prolemur]

If I leave out the system("cls"); line, it compiles fine for me and

works (compiler: g++, using Linux)

Damnit Linux! Always being better than windows. I'm using VS Express and I'm still getting errors without that line

 

Errors:

Error	1	error C2679: binary '>>' : no operator found which takes a right-hand operand of type 'std::string' (or there is no acceptable conversion)	c:\users\mike\documents\visual studio 2013\projects\guessing game\guessing game\source.cpp	11	1	Guessing GameError	2	error C2872: 'count' : ambiguous symbol	c:\users\mike\documents\visual studio 2013\projects\guessing game\guessing game\source.cpp	12	1	Guessing GameError	3	error C2679: binary '>>' : no operator found which takes a right-hand operand of type 'std::string' (or there is no acceptable conversion)	c:\users\mike\documents\visual studio 2013\projects\guessing game\guessing game\source.cpp	14	1	Guessing GameError	4	error C2872: 'count' : ambiguous symbol	c:\users\mike\documents\visual studio 2013\projects\guessing game\guessing game\source.cpp	20	1	Guessing Game	5	IntelliSense: no operator ">>" matches these operands            operand types are: std::istream >> std::string	c:\Users\Mike\Documents\Visual Studio 2013\Projects\Guessing Game\Guessing Game\Source.cpp	11	6	Guessing Game	6	IntelliSense: "count" is ambiguous	c:\Users\Mike\Documents\Visual Studio 2013\Projects\Guessing Game\Guessing Game\Source.cpp	12	9	Guessing Game	7	IntelliSense: no operator ">>" matches these operands            operand types are: std::istream >> std::string	c:\Users\Mike\Documents\Visual Studio 2013\Projects\Guessing Game\Guessing Game\Source.cpp	14	7	Guessing Game	8	IntelliSense: "count" is ambiguous	c:\Users\Mike\Documents\Visual Studio 2013\Projects\Guessing Game\Guessing Game\Source.cpp	20	4	Guessing Game

[ThreePinkApples]

Try a cin.ignore() after you have cleared the screen. No guarantee it will work, I just have a suspicion

 

EDIT: OH, you need #include <string> (it helped alot when you posted the errors )

[prolemur]

Try a cin.ignore() after you have cleared the screen. No guarantee it will work, I just have a suspicion

 

EDIT: OH, you need #include <string> (it helped alot when you posted the errors )

Thanks that removed a few errors, count being ambiguous however remains.

 

Errors:

Error	1	error C2872: 'count' : ambiguous symbol	c:\users\mike\documents\visual studio 2013\projects\guessing game\guessing game\source.cpp	13	1	Guessing GameError	2	error C2872: 'count' : ambiguous symbol	c:\users\mike\documents\visual studio 2013\projects\guessing game\guessing game\source.cpp	21	1	Guessing Game	3	IntelliSense: "count" is ambiguous	c:\Users\Mike\Documents\Visual Studio 2013\Projects\Guessing Game\Guessing Game\Source.cpp	13	9	Guessing Game	4	IntelliSense: "count" is ambiguous	c:\Users\Mike\Documents\Visual Studio 2013\Projects\Guessing Game\Guessing Game\Source.cpp	21	4	Guessing Game

[ThreePinkApples]

Try changing the name of count, there could be something in std that uses the same name, therefore it is ambiguous

[prolemur]

Try changing the name of count, there could be something in std that uses the same name, therefore it is ambiguous

Thanks I wouldn't have though about changing the variables name. I guess that is used as a variable in Visual Studio or Windows. Thanks again

 

Now I am a total C++ master!

[ThreePinkApples]

Started C++ two weeks ago myself, and I love it : D

[prolemur]

Started C++ two weeks ago myself, and I love it : D

Awesome! Are there any particular tutorials you have been learning from? Also what have you been liking about C++ and what programs have you made if you don't mind me asking?

[ThreePinkApples]

Oh, I am attending an University here in Norway and the C++ class is this semester (5. semester of Computer Engineering). 

 

I have just made some small simple programs as hand-ins for the class. Also started working on Project Euler in C++ just to get a little more feeling about it

 

I don't really know precisely what I like about it, it might just be me sick and tired of C# (had that last semester)

[prolemur]

Oh, I am attending an University here in Norway and the C++ class is this semester (5. semester of Computer Engineering). 

 

I have just made some small simple programs as hand-ins for the class. Also started working on Project Euler in C++ just to get a little more feeling about it

 

I don't really know precisely what I like about it, it might just be me sick and tired of C# (had that last semester)

Cool, I'm planning to do computer sciences as well, but in Canada, even though I'd love to have the internet speed in norway

I have bookmarked Project Euler as well

Ya I used to use Turing an old language they taught in my highschool and it wasn't good enough so I have now moved onto bigger and better things. finally

[bmxtricky5]

#include <iostream>using namespace std;int main() {    string name;string guess;int count = 0;	cout << "Enter a name for the other player to guess";	cin >> name;	while (count < 10) {		cout << "Enter your guess for the name";		cin >> guess;		if (guess == name) {			cout << "Congratulations you guessed the name, without cheating...!";			break;		}		else {			count ++;		}	}	return 0;}

dont define variables outside of the main function. when i put the var's in the main function it compiled fine. EDIT: removing the system("cls"); fixed the problem. i compiled using code blocks so yeaa it was on windows

[prolemur]

#include <iostream>using namespace std;int main() {    string name;string guess;int count = 0;	cout << "Enter a name for the other player to guess";	cin >> name;	while (count < 10) {		cout << "Enter your guess for the name";		cin >> guess;		if (guess == name) {			cout << "Congratulations you guessed the name, without cheating...!";			break;		}		else {			count ++;		}	}	return 0;}

dont define variables outside of the main function. when i put the var's in the main function it compiled fine. EDIT: removing the system("cls"); fixed the problem. i compiled using code blocks so yeaa it was on windows

 

Oh thanks I didn't know that.

[Ciccioo]

-snip-

this is because of variable shadowing: if there are two scopes, the first containing the second, each scope can have its own definition of a variable with the same name. if you name the variable, you're referring to the inner-most you can find in the current scope

 

example:

#include <iostream> int main(){          int i = 1;          {                    int i = 3;                    std::cout << "this is going to be 3: " << i << std::endl;                    i = 10; // this vale is writte to the inner-most i, which is just about to be destroyed because the scope is ending          }           std::cout << "this is going to be 1: " << i << std::endl;}

speaking about your code:

using namespace std; // import everything from std:: into the current scope. including std::count (http://www.cplusplus.com/reference/algorithm/count/) which is now accessible via its name, without namespace prefix int count = 0; // count already exists in the current scope, so creating a new one is ambiguous int main(){          count ++; // which one?}

using namespace std; // import std:: in this outer scope int main(){          int count = 0; // shadowing: count is declared in a different scope (the scope of main())           count ++; // refers to the inner-most declaration of count (the one local to main())}

[prolemur]

 

this is because of variable shadowing: if there are two scopes, the first containing the second, each scope can have its own definition of a variable with the same name. if you name the variable, you're referring to the inner-most you can find in the current scope

 

example:

#include <iostream> int main(){          int i = 1;          {                    int i = 3;                    std::cout << "this is going to be 3: " << i << std::endl;                    i = 10; // this vale is writte to the inner-most i, which is just about to be destroyed because the scope is ending          }           std::cout << "this is going to be 1: " << i << std::endl;}

speaking about your code:

using namespace std; // import everything from std:: into the current scope. including std::count (http://www.cplusplus.com/reference/algorithm/count/) which is now accessible via its name, without namespace prefix int count = 0; // count already exists in the current scope, so creating a new one is ambiguous int main(){          count ++; // which one?}

using namespace std; // import std:: in this outer scope int main(){          int count = 0; // shadowing: count is declared in a different scope (the scope of main())           count ++; // refers to the inner-most declaration of count (the one local to main())}

Thanks for clearing things up. I knew using namespaces imported the whole file, but I didn't know you could have different variables the the same name as long as they're in different scopes.