Sliding window frame

come from I wrote a poem , Turn the sliding window algorithm into a dictation problem

/*  Sliding window algorithm framework  */
void slidingWindow(string s) {
    
    unordered_map<char, int> window;
    
    int left = 0, right = 0;
    while (right < s.size()) {
    
        // c  Is the character that will be moved into the window 
        char c = s[right];
        //  Increase the window 
        right++;
        //  Make a series of updates to the data in the window 
        ...

        /*** debug  Output position  ***/
        printf("window: [%d, %d)\n", left, right);
        /********************/
        
        //  Determine whether the left window should shrink 
        while (window needs shrink) {
    
            // d  Is the character that will be moved out of the window 
            char d = s[left];
            //  contract the window 
            left++;
            //  Make a series of updates to the data in the window 
            ...
        }
    }
}