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C6272

Note

This article applies to Visual Studio 2015. If you're looking for the latest Visual Studio documentation, see Visual Studio documentation. We recommend upgrading to the latest version of Visual Studio. Download it here

warning C6272: non-float passed as argument <number> when float is required in call to <function>

This warning indicates that the format string specifies that a float is required, for example, a %f or %g specification for printf, but a non-float such as an integer or string is being passed. This defect is likely to result in incorrect output; however, in certain circumstances it could result in a crash.

Example

The following code generates this warning:

#include <stdio.h>  
#include <string.h>  
  
void f()  
{  
   char buff[5];  
   int i=5;  
  
   sprintf(buff,"%s %f","a",i);   
}  
  

To correct this warning, use %i instead of %f specification as shown in the following code:

#include <stdio.h>  
#include <string.h>  
  
void f()  
{  
   char buff[5];  
   int i=5;  
  
   sprintf(buff,"%s %i","a",i);    
}  

The following code uses the safe string manipulation function, sprintf_s, to correct this warning:

#include <stdio.h>  
#include <string.h>  
  
void f()  
{  
   char buff[5];  
   int i=5;  
  
   sprintf_s(buff,5,"%s %i","a",i); // safe version  
}  

See Also

sprintf, _sprintf_l, swprintf, _swprintf_l, __swprintf_l