Please use const char * (instead of char *) if possible

[euyuil]

For example, the function Login can take const char * as parameters. The library does not output the user name and password. It is not necessary to pass char * as parameters. Using const char * will also allow us to use string literals without compilation warnings.

https://github.com/abramwang/QuantPlusApi_Cpp/blob/7117dea1358b76d1ebab67476ab4acdae1aadd0e/include/PT_QuantApi.h#L352

[euyuil]

Also, the following example can be also improved, see last 2 parameters of:

https://github.com/abramwang/QuantPlusApi_Cpp/blob/7117dea1358b76d1ebab67476ab4acdae1aadd0e/include/PT_QuantApi.h#L452

MD_ISODateTimeType is of type char[21]. I suggest to define a new type, for example, typedef const char MD_ConstISODateTimeType[21] and use this as the type of the two parameters.

[muaji]

Fine, Thx for your suggestion.We will improve this in the next version.