Returning A Float Array from a function

findwitholding(Gross_Pay,FDH_Witholding,FW_TAXRATE);
findwitholding(Gross_Pay,FDH_Witholding,SW_TAXRATE);
findwitholding(Gross_Pay,FDH_Witholding,HOSPITALIZATION);

How can I return the the values from all three functions called?

void findwitholding(farray Gross_Pay, farray FDH_Witholding,
                float Witholding)
{          
    for(int i = 0; i < ISIZE; i++)               
        FDH_Witholding[i] = Gross_Pay[i] * Witholding;     
}

How can I pass it by value? Like this?

typedef float farray[5] //we have to use typedef
farray FED,STATE,HOSPITAL;

 FED = findwitholding(Gross_Pay,FDH_Witholding,FW_TAXRATE);
 STATE = findwitholding(Gross_Pay,FDH_Witholding,SW_TAXRATE);
 HOSPITAL = findwitholding(Gross_Pay,FDH_Witholding,HOSPITALIZATION);

If so, should it be like this for the function?

*farray* findwitholding(farray Gross_Pay, farray FDH_Witholding,
                float Witholding)
    {          
        for(int i = 0; i < ISIZE; i++)               
            FDH_Witholding[i] = Gross_Pay[i] * Witholding;    
        return FDH_Witholding;
    }