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Warning C6272

Non-float passed as argument 'number' when float is required in call to 'function-name'

Remarks

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 can lead to crashes, in addition to potentially incorrect output.

Code analysis name: NON_FLOAT_ARGUMENT_TO_FORMAT_FUNCTION

Example

The following code generates this warning. %f indicates a float is expected, but the integer i is passed instead:

void f()
{
     char buff[5];
     int i=5;
     sprintf_s(buff, sizeof(buff), "%s %f", "a", i);
}

To correct this warning, change the format specifier or modify the parameters passed to the function. In this example, we correct this warning by using %i instead of %f.

void f()
{
     char buff[5];
     int i=5;
     sprintf_s(buff, sizeof(buff), "%s %i", "a", i);
}

See also

Format specification syntax: printf and wprintf functions
sprintf, _sprintf_l, swprintf, _swprintf_l, __swprintf_l
sprintf_s, _sprintf_s_l, swprintf_s, _swprintf_s_l
C4477