C++ Iterators, using MinGW

[riveryu]

How do you use iterators?
Code below gave me a strange error.
Windows XP gave me an error and forced me to close it, along with send or not send report.
Thanks in advance.

c:

#include<iostream> #include<cstdio> #include<map> #include<string> using namespace std; int main () { map<string,int> m; m["a"] = 1; m["b"] = 1; m["c"] = 1; map<string,int>::iterator it; while (it != m.end()){ cout << (*it).first; it ++; } return 0; }

How do you do C++ syntax tags...?

[saltpro15]

which compiler are you using?
and c++ syntax tag is

c++:

[riveryu]

The title says "...using MinGW", by that i mean i'm using "Minimalist GNU for Windows" compiler.

http://www.mingw.org/ <- their website

I actually sort of doubt its the compiler though. I mean, it atleast did not give warnings or errors when compiling.

I'm using Code::Blocks IDE btw.

[saltpro15]

well that's embarassing lol

well, I'm sorry but I have almost no experience with Code::Blocks, so I'll let someone else field this question

[sharvil]

You forgot to initialize 'it'. The boilerplate that most people use is:

code:

for(std::map <std::string, int>::iterator it = m.begin(); it != m.end(); ++it) {     /* Logic */ }

[[Gandalf]]

MinGW is the Windows port of the GCC compiler.

[md]

sharvil @ 2009-03-21, 10:56 pm wrote:

You forgot to initialize 'it'. The boilerplate that most people use is:

code:

for(std::map <std::string, int>::iterator it = m.begin(); it != m.end(); ++it) {     /* Logic */ }

This exactlt. If you don't initialize your iterator weird thigns happen (if anything... I mostly forget what happens).

[riveryu]

Thanks guys, I solved my problem.