strstr(str1,str2) 函數用於判斷字符串str2是否是str1的子串。如果是,則該函數返回str2在str1中首次出現的地址;否則,返回NULL
char* m_Read_Buffer = "start = //http:www.baidu.com23333";
char* p = NULL;
char* q = NULL;
p = strstr(m_Read_Buffer, "start = ");
printf("first p :%s\r\n", p);
q = strstr(m_Read_Buffer, "23333");//delete 23333
if(q)
{
*q = '\0';
printf("second p:%s\r\n", p);
}
結果:first p: //http:www.baidu.com23333
second p://http:www.baidu.com
所以p,q,m_Read_Buffer指向的是同一地址空間,q指向的2333改爲‘\0’後,m_Read_Buffer也變了(start = //http:www.baidu.com),q也跟着變了(//http:www.baidu.com),遇見的一個Bug,以此記錄