一段值钱的代码

这是一段值钱的代码。能自动解析指定格式的数据。嘻嘻嘻嘻，至少这段程序为我挣了钱。

#include <stdio.h>
#include <math.h>

void myCpy(unsigned char *desc,unsigned char *src,unsigned int start){
    for(unsigned int i=start;i>0;i--){
        *desc++ = *src++;
    }
}

#pragma  pack(push)  //保存对齐状态
#pragma  pack(1)
typedef struct DP{
    unsigned char dp;
    unsigned char type;
    unsigned short int len;
    unsigned char *data;
}Dp;
#pragma  pack(pop)

unsigned int sizeofDp(Dp *thisDp){
   return thisDp->len+4;
}

unsigned long int getDpValue(Dp *thisDp){
    double value = 0;
    unsigned char *data = &thisDp->data;
    for(int i = 0; i<thisDp->len; i++){
        value += data[i]*pow(256.0,thisDp->len-1-i);
    }
    return (unsigned long int)value;
}

void dp_excutor(Dp *thisDp){
    printf("thisDp:\n\t dp:\t%d \n\ttype:\t%d \n\tlen:\t%d \n\tvalue:\t%d \n",thisDp->dp,thisDp->type,thisDp->len,getDpValue(thisDp));
    switch(thisDp->dp){
        case 1:
            break;
        case 2:
            break;
    }
}

typedef int (*fun_excutor)(Dp *thisDp);
unsigned int parser(unsigned char cmd[],unsigned int len,unsigned int startPosition  , fun_excutor dp_excutor){
    unsigned char myCmd[len-startPosition];
    unsigned char temp = 0;
    Dp *thisDp;
    myCpy(myCmd, cmd+startPosition, len-startPosition);
    temp  = myCmd[2];
    myCmd[2] = myCmd[3];
    myCmd[3] = temp;
    thisDp = (Dp *)((unsigned char*)myCmd);
    printf("\n size of Dp:%d\n",sizeofDp (thisDp));
    if(dp_excutor!=NULL){
        dp_excutor(thisDp);
    }
    if(startPosition+sizeofDp(thisDp) < len){
        parser(cmd,len,startPosition+sizeofDp(thisDp),(fun_excutor)dp_excutor);
    }
    return startPosition+sizeofDp(thisDp);
}

int main()
{
    unsigned char cmd[]= {10,4,0,1,1,11,2,0,4,0,0,1,244,8,2,0,4,0,0,0,10};
    unsigned int cmdLen = sizeof (cmd);
    parser(cmd,cmdLen,0,(fun_excutor)dp_excutor);
    return 0;
}