double Value::asDouble() const
{
CCASSERT(_type != Type::VECTOR && _type != Type::MAP && _type != Type::INT_KEY_MAP, "Only base type (bool, string, float, double, int) could be converted");
if (_type == Type::DOUBLE)
{
return _field.doubleVal;
}
if (_type == Type::BYTE)
{
return static_cast<double>(_field.byteVal);
}
if (_type == Type::STRING)
{
return static_cast<double>(atof2(_field.strVal->c_str()));
}
if (_type == Type::INTEGER)
{
return static_cast<double>(_field.intVal);
}
if (_type == Type::FLOAT)
{
return static_cast<double>(_field.floatVal);
}
if (_type == Type::BOOLEAN)
{
return _field.boolVal ? 1.0 : 0.0;
}
return 0.0;
}
main()
{
char line[MAXLINE];
printf("Type in a value of the form 123.45e-6\n");
/* checking my version of atof matches up with <stdio.h>'s version */
while (getline(line, MAXLINE) > 0) {
printf("\t%g\n", atof2(line)); /* my atof */
printf("\t%g\n", atof(line)); /* c's atof */
}
return 0;
}
/* atoi: convert string s to integer using atof */
int atoi2(char s[])
{
//double atof(char s[]);
return (int)atof2(s);
}
