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Arithmetic type - Balancing

This message is issued whenever a binary arithmetic operator is used with an expression of essentially floating type and an expression of integral type.

For example: 


/*PRQA S 1-9999 ++*/
/*PRQA S 1800 --*/

int f1800 (float a, int b)
{
  b = b + a;                /* 1800 */

  return ((a - 1.0f) + b);  /* 1800 */
}

MISRA-C:2004 Rules applicable to message 1800:

Rule  10.1  (Required) The value of an expression of integer type shall not be implicitly converted to a different underlying type if: a) it is not a conversion to a wider integer type of the same signedness, or b) the expression is complex, or c) the expression is not constant and is a function argument, or d) the expression is not constant and is a return expression

QA·C Source Code Analyser 8.1
MISRA-C:2004 Compliance Module 3.2
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