void swap_arraypos(char **firstNames, char **lastNames, int *famSizes, int *famPriorities, int numFamilies, int pos1, int pos2) {

    char ftemp[MAXNAMELEN];
    char ltemp[MAXNAMELEN];
    int sizetemp;
    int prioritytemp;

    strcpy(ftemp, firstNames[pos1]);
    strcpy(ltemp, lastNames[pos1]);
    sizetemp = famSizes[pos1];
    prioritytemp = famPriorities[pos1];

    strcpy(firstNames[pos1], firstNames[pos2]);
    strcpy(lastNames[pos1], lastNames[pos2]);
    famSizes[pos1] = famSizes[pos2];
    famPriorities[pos1] = famPriorities[pos2];

    strcpy(firstNames[pos2], ftemp);
    strcpy(lastNames[pos2], ltemp);
    famSizes[pos2] = sizetemp;
    famPriorities[pos2] = prioritytemp;

}