[previous] 0169 [next] [U] Unknown length modifier used with 'g' conversion specifier, number %s.
Explicitly undefined REFERENCE - ISO:C90-7.9.6.1 Formatted input/output functions

An unknown length modifier is being used in conjunction with a '%g' conversion specifier in a printf format string.

The only valid length modifier for a '%g' conversion specifier is "L" - indicating that the corresponding argument is of type long double.

In the code example below "l" has been used; but "l" is only valid with integer conversion specifiers. 


/*PRQA S 185,336,602,1307,2017,3122,3200,3209,3227,3408,3602,3625 ++*/

#include <stdio.h>

extern void foo(float ftot, double dtot, long double ltot)
{
    printf("The total is %g",  ftot);  /* OK */
    printf("The total is %g",  dtot);  /* OK */
    printf("The total is %Lg", ltot);  /* OK */

    printf("The total is %lg", ftot);  /* Message 0169 */
}

MISRA C:2012 Rules applicable to message 0169:

Rule-1.3  (Required) There shall be no occurrence of undefined or critical unspecified behaviour

QA·C Source Code Analyser 8.1
MISRA C:2012 Compliance Module 1.0
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