2.1.2.20 is_str_numeric

Description

Check and convert a string to a double

Syntax

BOOL is_str_numeric( LPCSTR lpcsz, double * lpVal = NULL, DWORD dwCntrl = 0 )

Parameters

lpcsz

[input] string to check and convert

lpVal

[output] optional pointer to hold resulting value

dwCntrl (9.2)

[input] control bits, enumerated as CVTSTR2NUM_*

Return

true if str is a valid numeric string,otherwise false

Examples

EX1

void is_str_numeric_ex1()
{
	double d = 0;
	string str = "123.456";//change to "abc" to see different result;
	bool bRet = is_str_numeric(str , &d);
	if(bRet)
		printf("\"%s\" is converted to %f \n" ,str ,d);
	else
		printf("\"%s\" can not be converted \n" ,str);
}

Remark

See Also

is_numeric, is_str_numeric_integer, is_str_numeric_integer_with_args

Header to Include

origin.h

Reference