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How to convert decimal string to float?

P: n/a
I have a string representing a decimal value like 123.456 (or -90.4005 etc.) and I need to represent it by a float datatype (4 bytes). What is the math used to do so? When I Google all I can find are calculators that do it for you but I have to implement it on a microcontroller. Thanks.
Oct 6 '10 #1
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weaknessforcats
Expert Mod 5K+
P: 9,197
Are you using C or C++?

If it's C, then call atof().

If it's C++, insert your string into a stringstream and extract it to a double.
Oct 6 '10 #2

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