std::string input not working, VC++6.0

[NerdTastic]

I'm using MS VC++ 6.0 Enterprise, which sucks. But alas, moving on.

The line I have currently is:

cin >> input; //input is declared as std::string input;

Error:
g:\c++\jarvis\jarvis.cpp(26) : error C2679: binary '>>' : no operator defined which takes a right-hand operand of type 'class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >' (or there is no acceptable conversion)

I have also tried using getline:

getline(cin, input);

Error:
g:\c++\jarvis\jarvis.cpp(26) : error C2065: 'getline' : undeclared identifier

My includes:

#include <iostream.h>
#include <stdio.h>
#include <stdlib.h>
#include <conio.h>
#include <vector>
#include <string.h> 

[guestgulkan]

should be #include <string>

(string.h is something completely different)

[NerdTastic]

c:\program files\microsoft visual studio\vc98\include\ostream(9) : fatal error C1083: Cannot open include file: 'ios': No such file or directory

EDIT: I get this when I switch out the .h

[Whovian]

Why are you using iostream.h? I suggest you use iostream without the .h.

It also looks like you're trying #include<ostream> instead of #include <iostream>(?)

[cire]

microsoft visual studio\vc98\

This place isn't really about getting 14 year old compilers to work. Perhaps you should considering using something a bit more modern.

[idgafsmd]

if you declared input as std::string input, then shouldn't the declaration for getline be std::getline(std::cin, input); (or)
std::cin>>input;

[Whovian]

No, I don't think getline(istream,string) is in std. For instance, the following code worked fine.

#include <iostream>
#include <string>

int main()
{
    std::cout << "Say something." << std::endl;
    std::string name;
    getline(std::cin,name);
    std::cout << "You entered: " << name << std::endl;
    return 0;
}

[firedraco]

getline should be in the std namespace. If it isn't, you have a problem with your supplied libraries probably.

[idgafsmd]

Oh, wow, never suspected that, so getline is from #include <string>
and it's initialization does not need std? ;O !

[idgafsmd]

getline is in my std:: but I guess it does not matter if you include getline without using namespace std; or using std::getline it still debugs fine...

[NerdTastic]

I know the compiler is ancient, but it's the one my school makes me use. If I were doing this myself I'd use my copy of Express. but anyway. I will try it with std::getline

[Cubbi]

Whovian wrote:

No, I don't think getline(istream,string) is in std. For instance, the following code worked fine.

getline(std::cin,name);

This code uses std::getline(), due to argument-dependent lookup (whenever an unqualified function call is made, the compiler first looks in the namespace of the arguments. That's why it's possible to write std::cout << name and not std::operator<<(std::cout, name) )

[NerdTastic]

using std::getline didn't help... was told that

g:\c++\jarvis\jarvis.cpp(12) : error C2039: 'getline' : is not a member of 'std'
g:\c++\jarvis\jarvis.cpp(12) : error C2873: 'getline' : symbol cannot be used in a using-declaration
g:\c++\jarvis\jarvis.cpp(27) : error C2039: 'getline' : is not a member of 'std'
g:\c++\jarvis\jarvis.cpp(27) : error C2065: 'getline' : undeclared identifier

[Whovian]

I suggest that you don't use std::getline(std::istream,std::string), then. My IDE seems to support either std::getline or getline, without a using namespace std;.

[NerdTastic]

What other functions can I use to get a c++ std::string?
EDIT: with the delimiter of a space... here:

void ParseInput()
{


	string Temp;
	do
	{
	//Check token
	while (getline(cin, Temp, ' ')) 
	{
		//save token
		parsed.push_back(Temp);
		//check token
		for(int x=0; x<greetings.size(); x++)
		{
			if(Temp==greetings[x])
			{
				cout << "Greeting found!" << endl;
			}
		}

		for(int y=0; y<commands.size(); y++) 
		{
			if(strcmp(Temp, commands[y])==0)
			{
				cout << "Command found!" << endl;
			}
		}

		for(int z=0; z<objects.size(); z++)
		{
			if(strcmp(Temp, objects[z])==0)
			{
				cout << "Object found!" << endl;
			}
		}
	//end of while loop		
	}
	//end of do loop
	}(while Temp!="end");

I'll work on the strcmp() stuff after I have strings to compare. all of the things I compare temp too are vector<string> containers

[Stewbond]

You could use:

std::string entry;
std::cin >> entry;

or

std::string entry;
std::getline(std::cin, entry);

The difference is that the first method will give you everything up until the first whitespace. The second one will give you everythign up until the first new line.

[NerdTastic]

So in the code I just posted above, replacing getline with cin should still do what I want?

Tried it, got this:
error C2679: binary '>>' : no operator defined which takes a right-hand operand of type 'class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >' (or there is no acceptable conversion)

[Stewbond]

I assume so. That is assuming that you aren't worried about \t or \n.

[NerdTastic]

see above

[Stewbond]

In that case, you didn't include:
#include <string>

Note that this is very different from
#include <string.h>
or
#include <cstring>