C / C++ / MFC

double df = 0;
CString str = "6.591E+02";
df = atof(str);

camuoi288 wrote:

atof() parameter in atof()function is char * but my string is Cstring

double atof(const char *string);

CString str = "1.234";
double d = atof(str);

CString a = "6.591E+02";
float b;
sscanf(a,"%E",&b); //use _stscanf() for unicode suppport

CString a = "6.591E+02";
float b;
b = atof(a);     // use _ttof() for unicode support

#include <sstream>
{
	CString strFloat("3.5");
	istringstream is(strFloat);
	float myFloat;
	is >> myFloat;
}

float af = atof("a");
float zerof = atof("0");

{
	CString strFloat("3.5");
	istringstream is(strFloat);
	float myFloat;
	is >> myFloat;
	if (is.fail())
	{
		// Conversion failed!
	}
}