how to debug with Code::Blocks in step mode ?

[vfdff]

I　ｃａｎ＇ｔ　ｗａｔｃｈ　ｔｈｅ　ｖａｌｕｅ　ｉｎｔ　ｔｈｅ　ｗａｔｃｈ　? only seeing some '?' with the value  same as 
i = No symbol 'i' in current context

my code:
/*
 */

#include <avr/io.h>

int main(void)
{

    // Insert code
    int i = 34;
    int tt = 2*i;

    i= tt+3;
    i <<= 2;

    while(1)
    {
        i++;
    }
    ;

    return 0;
}
while in which can be seen some "i" in the context

[Jenna]

A little less information.

Which OS are you on, which version of C::B do you use, which compiler (and version) and which debugger and version ?

Can you give the steps to reproduce the problem (works without problems for me) ?

[vfdff]

I use it on my windows xp operation,and choose avr project to create ,and compile with avr gcc ?

[ollydbg]

I use it on my windows xp operation,and choose avr project to create ,and compile with avr gcc ?

I'm not sure AVR GCC can debug?
Why not try MinGW?

[vfdff]

yeah, it runs all right with GCC