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String Input & Comparison

 
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String Input & Comparison, in C++....
SPlutard
post 28 Mar, 2006 - 10:15 AM
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code.ninja @ Java, C, Flash, Python

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Well, I'm switching over from C to C++, and a few things are kinda weird when it comes to strings:

a.) How can I input a string into a variable from the user? I have:
CODE
std::cin>>mystring;
but that makes my compiler go nuts.

b.) I'm having trouble comparing two strings....sort-of. Is something like
CODE
if(string1 == string2)
legal? What about using >, <, <=, >=, and != operators? Do those compare length or what?

c.) Is there a specific header file needed for strings? #include <string.h>?

Sorry these sound like weird quesions, but I'm used to doing things differently in C.
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Amadeus
post 28 Mar, 2006 - 10:29 AM
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g++ -o drink whiskey.cpp

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Here is a good overview of the string class, although more in depth ones are available.
http://www.msoe.edu/eecs/ce/courseinfo/stl/string.htm

a.) your compiler may be going nuts becasue you have not included the proper string library

CODE

#include<string>
using namespace std;

int main(void)
{
  string mystring;
  cin>>mystring;
  return 0;
}

should be fine, although if you want to include spaces, you'll have to use another method, like .getline().

b.) Here is a list of how operators perform on strings (although, to cmpare the two, you can also use the .compare() method):
http://www.cppreference.com/cppstring/string_operators.html

c.) see above code snippet.

Here are some string methods
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SPlutard
post 28 Mar, 2006 - 10:30 AM
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code.ninja @ Java, C, Flash, Python

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Thanks!
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