#include
#include
char *head_count(char *str, char *head)//找出帧头前面的字符串
{
char *temp;
int size_head = strlen(head);
int count1 = 0;
int head_flag = 0;
if(str == NULL || head == NULL)
{
return NULL;
}
if(strlen(str) < strlen(head))
{
return NULL;
}
while(*str != '