wsprintf() Function how to read Double Variable

[mecheil.edwar]

I have one problem with wsprintf Function
if I write this code :

int I =500  ;int S ;
WCHAR sBuffer[10];
S= wsprintf(sBuffer,TEXT("  I value :  %i  "), I);   // Here is the problem

Now My Problem is , If The Varibale I is double Not integer , How can I let wsprintf read the double variable

Simply if I have I = 122.45566777776 as Example , how can I print by using wsprinf function.

I think I have to convert I number (122.45566777776) to WCHAR varaible then print directly
But this will be very long way if I have to convert each int variable to wchar variable.



Kindly advise , and provide code examples if possible.

Thanks & Regards

[VictorN]

1. wsprintf() does not read, it writes (prints).
2. Correct format specifier for double in printf

[S_M_A]

wsprintf is an old remnant from the 16-bit era that, in order to have low footprint and be faster than sprintf, not supports floating point numbers. It also has a buffer size limit of 1024 bytes. See http://msdn.microsoft.com/en-us/libr...(v=vs.85).aspx

You should use one of the other formatting functions available like sprintf (or variants of it) or std::stringstream.

[VictorN]

wsprintf is an old remnant from the 16-bit era that, in order to have low footprint and be faster than sprintf, not supports floating point numbers. It also has a buffer size limit of 1024 bytes. See http://msdn.microsoft.com/en-us/libr...(v=vs.85).aspx

Wow!
Very nice to learn again something new!
Frankly, I NEVER used wsprintf(). Ever. Since the most of my projects are MFC ones I also very rarely use sprintf.
So, sorry for the incorrect reply!

[S_M_A]

Frankly, I can't tell how happy I am learning you something new. Such opportunities are at the best very rare...

[mecheil.edwar]

Thanks so much S_M_A and VictorN for valuable answers,

and Here is code example :

 int p,z;
double x;    x = 23.4454          // as example

 CHAR AA[20];
 TCHAR sBuffer[80];
z= sprintf_s(AA, " %f",x);      	// Note sprintfl not working with win7_64  MSDN Recommend sprintf_s							 
 p=wsprintf(sBuffer,TEXT("%S"),AA);  // S should be Capital
x=_wtof(sBuffer);                           // Now again we con convert TCHAR to Double by using _wtof function

[Codeplug]

>> // S should be Capital
You should use "%hs". I recommend that you forget that %S even exists - use %s, %ls, or %hs.

>> // Now again we convert TCHAR to Double by using _wtof function
You should use _ttof().

gg