Page 179 - C-Language

}

However you can also use a struct as a return value which allows you to return both an error
status along with other values as well. For instance.

typedef struct {
int iStat; /* Return status */
int iValue; /* Return value */
} RetValue;

RetValue func (int iValue)
{
RetValue iRetStatus = {0, iValue};

if (iValue > 10) {
iRetStatus.iValue = iValue * 45;
iRetStatus.iStat = 1;
}

return iRetStatus;
}

This function could then be used like the following sample.

int usingFunc (int iValue)
{
RetValue iRet = func (iValue);

if (iRet.iStat == 1) {
/* do things with iRet.iValue, the returned value */
}
return 0;
}

Or it could be used like the following.

int usingFunc (int iValue)
{
RetValue iRet;

if ( (iRet = func (iValue)).iStat == 1 ) {
/* do things with iRet.iValue, the returned value */
}
return 0;
}

Read Function Parameters online: https://riptutorial.com/c/topic/1006/function-parameters

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