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Switch statements

This 'switch' statement does not contain a 'default' clause. This could be dangerous if the controlling expression has an unexpected value.

For example: 


/*PRQA S 2017,3120,3227,3408 ++*/

extern int foo(int n)
{
    int r = 0;

    switch (n)
    {
    case 1:
        r = 5;
        break;

    case 3:
        r = 10;
        break;

    case 5:
        r = 20;
        break;
    }                                   /* Message 2002 */

    return r;
}

MISRA C:2012 Rules applicable to message 2002:

Rule-16.4  (Required) Every switch statement shall have a default label

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