I am designing a gui in visual c++ and there is a textbox where user inputs values so a calculation can be performed. How do I validate the input to ensure it can be cast to a double value?
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I am designing a gui in visual c++ and there is a textbox where user inputs values so a calculation can be performed. How do I validate the input to ensure it can be cast to a double value?
Since this seems to be a C++ CLI related question and your string from the textbox might be a .NET string, you might want to check the static Double::Parse method. For more portable solutions see the other answers…