原创 Linux編程中遇到的幾個函數

1.atoi函數

This function converts a given string to integer

int atoi(const char *sz);

returns the string's integer value

2.memset函數

set buffers to a specified character

memset{

      void *dest,//pointer to destination

     int c,// character to set

    size_t count // number of character

     }

return the value of dest

3. htonl /htons

 convert a u-long/u-short from host to TCP/IP network byte order,which is big-endian

u_long htonl{  u_long hostlong}

u_short htonl{  u_short hostlong}

4.fcntl 整理中