Пример Struct в с++

#include <conio.h>
#include 
#include 
#include 
#include 
#define XW 100
typedef struct 
{
        char title[81];
        char author[81];
        float cost;
}book;
void input_book(book b[XW],int i)
{
        printf("Vvedite nazvanie\n");
        scanf("%s",&b[i].title);
        printf("Vvedite avtora\n");
        scanf("%s",&b[i].author);
        printf("vvedite ceny\n");
        scanf("%f",&b[i].cost);
        printf("******************\n");
}
void output_book(book b[XW], int i)
{
        printf("\'%s\" by %s\t%.2f Rub",b[i].title,b[i].author,b[i].cost);
}
 
int main (void)
{
        book b[XW];
        int i,n,k;
        printf("Scol'ko knig?");
        scanf("%d",&n);
        if(n>100)
        {
                printf("oshibka vvoda");
                getch();
                return 0;
        }
        for(i=0;i<=n;i++)
        {
         input_book(b,i);
        }
                k=0;
        for(i=1;i<=n;i++)         
        {                 
                if(b[i].cost > b[k].cost)
                {
                   k=i;
                }
        }
        printf("samai dorogaia kniga \n");
        output_book(b,k);
        getch();
        return 0;
}