how to convert char* type to double in C++

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char *ptr = "0.3312015";

I want to get "0.3312015" and convert to double type,
*ptr can only get the first char 0,
how to write this program?
thanks for answer.

Posted 31-Oct-14 2:55am

xuyunhai

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2 solutions

Solution 2

Use a std::istringstream or std::istrstream (if you can cope with the axe of deprecation that's been hanging over the latter since 1998). You can read stuff in from that array the same way you can from cin.

Posted 31-Oct-14 3:48am

Aescleal

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CPallini 31-Oct-14 10:01am

5. The C++ way.

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OriginalGriff · Accepted Answer · 2014-10-31T03:25:00

Solution 1

Use the atof[^] function: that is what it is there for!

Posted 31-Oct-14 3:25am

OriginalGriff

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CPallini 31-Oct-14 10:00am

5. The C way.