bool extend()	// ïðîâåðêà íà ïåðåïîëíåíèå ÄÌ è ðàñøèðåíèå
{	
	if ( (n+ 1 ) >= sz) return false;
	n++;
	return true;
}
....
void add()
{
	if (extend())		// íå ïåðåïîëíåí ëè ÄÌ
	{
		printf("\n Enter F.I.O.:  "); 
		scanf("%s",D[n].FIO);
					
		printf(" Enter number of the test book:  ");
		scanf("%d",&D[n].namber);
		
		printf(" Enter the name of faculty:  "); 
		scanf("%s",D[n].FAK);
		
		printf(" Enter the name of group:  ");
		scanf("%s",D[n].GROOP);
	}
	else
		printf("Table is full of data! Sorry for inconvenience.");
	
}
 ....

void show()
{
	printf("\n________________________________________________________________________________");
	
	printf("I N I           F.I.O.           I    N test book    I   Faculty   I   Group   I");
	printf("********************************************************************************");
	for(int i= 0 ;i<=n;i++)
	{
		printf("I %-2dI %-27s",i+ 1 ,D[i].FIO);
		printf("I %-18d",D[i].namber);
		printf("I %-12s",D[i].FAK);
		printf("I %-10sI",D[i].GROOP);
		printf("--------------------------------------------------------------------------------");
	}
	printf("\n\n");
}
...
void example()
{
	strcpy(D[n].FIO, "Ivanov");
	D[n].namber= 1234156 ;
	strcpy(D[n].FAK, "AVT");
	strcpy(D[n].GROOP, "AM");
	
	extend();
	strcpy(D[n].FIO, "Ivanov2");
	D[n].namber= 222 ;
	strcpy(D[n].FAK, "AVT2");
	strcpy(D[n].GROOP, "AM2");
	
	extend();
	strcpy(D[n].FIO, "Ivanov3");
	D[n].namber= 333 ;
	strcpy(D[n].FAK, "AVT3");
	strcpy(D[n].GROOP, "AM3");
	
}


void main()
	{
	int k,i;


	D=new man[sz];

	example();
	
	while( 1 )
		{
....
....