[previous] 0686 [next] Array has fewer initializers than its declared size. Default initialization is applied to the remainder of the array elements.
Declarations and definitions REFERENCE - ISO:C90-6.5.7 Initialization - Semantics

The initialization of this array is incomplete. The remaining elements for which an initializer has not been specified will be initialized to zero; but is this the intention ?

If initialization is provided for some elements of an array, it is considered good practice to provide explicit initialization for all elements, so as to avoid any uncertainty about the intention, An exception to this rule is the provision of a single braced initializer "{ 0 }". This is considered a satisfactory way of initializing the entire contents of an array to zero. For example: 


/*PRQA S 2017,2213,3120,3132,3211,3408 ++*/


int buf1[4]    = { 0 };                             /* OK */

int buf2[4]    = { 1, 2, 3, 4 };                    /* OK */

int buf3[4]    = { 1, 2, 3 };                       /* Message 0686 */

int buf4[3][3] = {{0},{1, 2, 3}, {4, 5, 6} };       /* OK */

int buf5[3][3] = { { 1, 2, 3 } };                   /* Message 0686 */

MISRA C:2012 Rules applicable to message 0686:

Rule-9.3  (Required) Arrays shall not be partially initialized

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