string to integer type conversion if the string is taken from text box in visual c++ using visual studion n windows forms

i need the code to convert the string type data into integer type d开发者_如何学Cata if i have entered a numerical value in the text box. i am using visual c++ windows forms and the visual studio

i am using visual c++ windows forms and the visual studio

If it's really Windows Forms (i.e. C++/CLI) it's just Int32::Parse or Int32::TryParse, just like in any other .NET language.

I think what he wanted was:

String^ numberS = "42";
int number;

number = Convert::ToInt32(numberS);

Assuming that you have the variable in a std::string instance, you can use streams to do it like this:

std::string str = "1";
std::istringstream iss;
iss.str(str);

int val = 0;
iss>>val;

As long as you can access the raw character data in the text box you can simply use atoi