sscanf 函数用法

sscanf, swscanf

Read formatted data from a string.

int sscanf( const char *buffer, const char *format [, argument ] ... );

int swscanf( const wchar_t *buffer, const wchar_t *format [, argument ] ... );

A format specification has the following form:

%[*] [width] [{h | l | I64 | L}]type

例子：

//一般用法
char str[512] = {0};
sscanf("123456 ", "%s", str);
printf("str=%s/n", str);
//结果str=123456

memset(str,0,512);
sscanf("123456 ", "%4s", str);//取最大长度为4字节的字符串
printf("str=%s/n", str);

//结果str=1234

memset(str,0,512);
sscanf("123456 abcdedf", "%[^ ]", str);//取遇到空格为止字符串
printf("str=%s/n", str);

//结果str=123456

memset(str,0,512);
sscanf("123456abcdedfBCDEF", "%[1-9a-z]", str);//取仅包含1到9和小写字母的字符串
printf("str=%s/n", str);
//结果str=123456abcdedf

memset(str,0,512);
sscanf("123456abcdedfBCDEF", "%[^A-Z]", str);//取遇到大写字母为止的字符串
printf("str=%s/n", str);
//结果str=123456abcdedf

char ip[]="192.168.0.254";
BYTE c[4]={0};



sscanf(ip,"%d.%d.%d.%d",&c[0], &c[1], &c[2], &c[3]);



//结果c[0]=192，c[1]=168，c[2]=0，c[3]=254

//注意IP地址的内容哦

char mask[]="255.255.255.0";
BYTE m[4]={0};
sscanf(mask,"%d.%d.%d.%d",&m[0], &m[1], &m[2], &m[3]);
//结果m[0]=255，m[1]=255，m[2]=255，m[3]=0