//convert a string to a number

#include <stdio.h>
#include <stdlib.h>
#define ERROR 1000000000
int char_to_i(const char val)
{
    int rtn ;
    if (val < '0' || val >'9') return ERROR;
    rtn = val - '0';
    return rtn; 
}
double a_to_i(const char * val)
{   
    int len ;
    double sum;
    int negative;
    int is_decimal;
    int current;
    double current_d;
    int distance;
    int i,j;

    sum = 0;
    len = strlen(val);
    negative = 0;
    is_decimal = 0;
    distance = 0;
    current_d = 0;
    for (i =0; i < len ; i ++)
    {
        if (val[i] == '-') {
            if (negative) return ERROR;//can not have 2 '-'
            negative = 1;
            continue;
        }

        if (val[i] == '.') {
            if (is_decimal) return ERROR;// can not have 2 '.'
            is_decimal = 1;
            continue;
        }
        current = char_to_i (val[i]);
        if (current == ERROR) return ERROR;
        current_d =(double) current;
        if (is_decimal){
            distance ++;
            for (j = 0 ; j < distance ; j++) current_d=current_d/10;
            sum += current_d;
        }else{
            sum = sum*10 + current_d;
        }
    }
    if (negative) sum = 0 - sum;
    return sum;
}
int main(void)
{
    char in[255];
    printf("Plea input a string to test!\n");
    scanf("%s ",in);
    printf("the value is %f",a_to_i(in));
    return 0;
}

We need to experience a lot of graduations in our lives.No matter feeling sad to separate with classmates and teachers, or wondering the new lieves we are going to face,  graduations means a lot to to us.

Today I attended my son's  graduation ceremony from kindergarten.I had thought graduations did not make sense to children, and the ceremony was just a simple precess. It's really suprise me that the teachers really took serious of that ceremony.

After the lecture from the host and the president ,  the children began to do some performance. Their teacher keep busy directing them to act well or seat quiet. As a powerpoint was showing on the screen, the host recall some scenes of the children's activity.

Enventually, it's time to the children say goodbye to their teach. The teacher's tear burn out her eyes, and she said she always welcome her children come back to see her. All the parents were deeply affected by her love.

//1 year ago, I had this test, then join current company. Now, I think I'v got some improvement , no recursion, manipulate a tree.

#include <stdio.h>
#include <stdlib.h>
#define MAX_LENGTH 100

int seed;
typedef struct _node{
      struct _node * children[MAX_LENGTH];
      int children_count ;
      int value;
      int level;
      struct    _node * parent;
}node;

int radom()
{
    return seed++;
}

node * create_tree(int level)
{
    node * stack [MAX_LENGTH];
    int stack_length;
    node * current;
    node * root;
    node * new_node;
    int i ;
    if (level == 0) return 0;
    stack_length = 0;
    root = malloc(sizeof(node));
    root -> parent = 0;
    root -> level = 0;
    root -> value = radom();
    root -> children_count = 2;
    stack [stack_length++] = root;
    printf ("now create a node's value is %d\n", root->value);
    while(stack_length > 0)
    {
        current = stack[--stack_length];
        for ( i = 0 ; i < current ->children_count ; i ++ )
        {
            new_node = malloc(sizeof(node));
            new_node->level =  current->level + 1;
            new_node->value = radom();
            new_node->parent = current;
            new_node->children_count = 2;
            current -> children [i] = new_node;
            if (new_node ->level < level)
            {
                stack [stack_length ++] = new_node;
            }
            else
            {
                new_node -> children_count = 0;
            }
            printf ("now create a node's value is %d\n", new_node->value);
        }
    }
    return root;
}

void tranvers_tree(node * root)
{
    node * stack[ MAX_LENGTH];
    int stack_length;
    node * current ;
    int i;
    stack_length = 0;
    stack [stack_length++] = root;
    while(stack_length > 0)
    {
        current = stack [--stack_length ];
        printf("current node's value is %d\n",current -> value);
        for (i = 0; i < current ->children_count ;i ++)
        {
            //printf("current node's children's  value is %d\n",current ->children[i] -> value);
            stack [stack_length ++] = current -> children[i];
        }
    }
}
int main(void)
{
    seed = 0;
    printf("Create tree\n");
    node * root = create_tree (3);
    printf("tranvers tree\n");
    tranvers_tree (root);
}

Much as we complain about Microsoft's products,  we are no longer avoid using their product. Recently , I found 2 windows live writer and windows live mail are quite attractive.

The following pictrue is taken from windows live writer, it looks quite windows vistal style. And it's functions are good too, such as inserting pictrue, inserting image,etc...

The following pictrue is taken from windows live mail.By using it to edit email, you don't need to worry about session time out any more. And the speed of get emails through it is more faster than through internet.

Motorola 7789 is a mobile phone produced by Motorola Ltd. It's a device for calling and sending text message. It's composed of an antenna, a cover and a main body. It is made of plastic. The main body of it is a rectangular box, the box is about 1*3*9cm. The antenna of it is tubular, the diameter  of the antenna is about 0.5 cm.  The cover of it is rectangular board, the base of the cover is about 3*4.

'I just want live a peace,ordinary life with my family' , maybe some celebrities will think so.  In the light of that statement , I'm this kind of luck man, I love my family , I'm health, and I can got salary from my company every month.  But the bad thing is , I don't want just be a ordinary guy, a guy work but have not brilliant success. And as a ordinary guy, I worry about my child's education , and worry about medical things. I try my best, with my parents' help, I managed to buy a house, but I sould pay half of my salary to bank every month . Anyway, my trouble is I don't want just be a ordinary guy.

Yesteday, I finished reading a book,'c++ Primer'. To improve my coding skill, I have paid much time to reading books ,such as  c, c++, oracle, design patterner. I think now is the time I pratice something, so I want to join some open source projects.  But it seems this kind of projects need learning some skills of build up the envirment. I dont's know whether I can consist on doing it, and I don't know whether I can still have enough time in next half year. Maybe that's why I'm ordinary, I don't have engouh confident. I will try, a man sould fight for his ideas.