simulink模型​转换成exe程序后，​如何根据需要修改模型​参数？After build an exe, how can I tunable the parameters?

simulink模型中，以变量赋值的模型参数（比如Gain模块中参数Gain赋值以变量K），将模型转为可执行的exe程序，需要先给变量K赋值，转换后执行exe程序，K值就不能改变了。我的问题是：我如何实现在执行exe程序时，根据自己的需要修改K的值，得到不同的仿真结果？ In a simulink model, with variable assignment model parameters, when you will to build it to exe, you must give a const to the variable first,and then the parameter is nontunable.My question is that how can i tunable the parameter according to my own need, when i run the exe.

[Kaustubha Govind]

Is the block parameter that you use the variable in tunable or nontunable? One way to check is to double-click on the block to open the dialog while simulation is running. If the parameter is disabled, it is nontunable.

[jianxin]

In the simulink model the parameters is tunable,my question is after build the model an exe, I cann't tunable the parameters .