sscanf用法總結

使用sscanf來提取字符串中的指定內容, 感受還不錯, 如今在這裏作一個總結

注意代碼中變量均無定義, 能夠根據用法自行定義.

//1.基本用法
string = "hello world 88888";
sscanf(string, "%s %s %d", buf1, buf2, &digit);
//sscanf返回提取變量的個數

//2.提取指定長度的字符串
string = "a123ddd444";
sscanf(string, "%5s", buf1);
printf("%s\n", buf1); //a123d

//3.提取到指定字符爲止的字符串
string = "Content-Length: 2556";
sscanf(string, "%[^:]:%d", buf1, &digit);

/*buf1:Content-Length                 digit: 2556*/

//3.提取到指定字符集
string = "123abcABC";
sscanf(string, "%[^a-z]", buf1);
/*buf1: 123*/

//4.獲取到指定字符中間的字符
string = "ios<android>wp7";
sscanf(string, "%*[^<]<%[^>]", buf1);
/*buf1: android*/

//5.指定有跳過的字符
string = "iosVSandroid";
sscanf(string, "%[a-z]VS%[a-z]", buf1, buf2);
/*buf1: ios   buf2: android*/

//6.分割以某字符爲間隔的字符串
string = "android-ios-wp7";
sscanf(string, "%[^-]-%[^-]-%[^-]", buf1, buf2, buf3);

//7.過濾掉不要的字符串
//用在%號後面加一*號,表明過濾這個字符串,不讀取 
string = "android ios wp7";
sscanf(string, "%s %*s %*s", buf1);