C + + implementation removes whitespace characters before and after string strings

The string class provided by the C + + standard library does not provide a CString-like trim method, which is used to remove whitespace characters before and after a string. This functionality can be easily implemented using some of the methods of string itself.

As follows:

void Trim (String & str) {string blanks ("\f\v\r\t\n"); Str.erase (0,str.find_first_not_of (Blanks)); Str.erase ( Str.find_last_not_of (Blanks) + 1);}

The test is as follows:

int _tmain (int argc, _tchar* argv[]) {string S1 ("\ t   string  "), cout << "[" << S1 << "]" << E Ndl Trim (S1), cout << "after trim:\n", cout << "[" << S1 << "]" << Endl;return 0;}

C + + implementation removes whitespace characters before and after string strings