PRB: "Floating-point Support Not Loaded" Error with scanf()
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Article ID : 37507
Last Review : September 17, 2003
Revision : 1.0

This article was previously published under Q37507
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SYMPTOMS
CAUSE
RESOLUTION
STATUS
MORE INFORMATION
Sample Code
SYMPTOMS
When an application uses the scanf() function to read a floating-point value from the console into an uninitialized "float" type global variable, an R6002 "floating-point format support not loaded" error occurs. This error also occurs when any formatted input routine is used to read a value.
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CAUSE
The compiler does not generate a reference to the __fltused variable that instructs the linker to load the floating-point support module.
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RESOLUTION
To work around this problem, initialize the floating-point variable or use the variable in an expression in the routine that contains the scanf() call.
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STATUS
This behavior is expected. To minimize the size of the executable file, the compiler loads floating-point support only when it is required.
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MORE INFORMATION
When a module uses only one of the formatted input routines and does not also initialize a floating-point variable, the compiler does not load floating-point support.

Remove the comment indication from either or both of the two lines in the sample code below to eliminate the R6002 error.
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Sample Code
   /*
    * Compile options needed: none
    */

   #include <stdio.h>
   float x ;

   main()
   {
   // Remove the comment from the next line to eliminate the error.
   // x = 2.3 ;

      scanf ("%f", &x) ;

   // Remove the comment from the next line to eliminate the error.
   // printf ("%f\n", x) ;
   }

 결론은 scanf 절대 쓰지 말자..

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