Нужна еще одна информация

#include<stdio.h>
int main()
{FILE*pt_f;
int a,b[20];
int i,n,ku,ni,ki,k,dop[20];
n=20;
ku=0;
pt_f=fopen("dan.txt","w");
for(i=0;i<n;i++)
{
scanf("%6.1d",&a);
fprintf(pt_f,"\n%6.1d",a);
}
fclose(pt_f);
pt_f=fopen("dan.txt","r");
for(i=0;i<n;i++)
{
fscanf(pt_f,"\n%6.1d",a);
printf("%6.1d",a);
}
fclose(pt_f);
pt_f=fopen("dan.txt","w");
for(i=0;i<n;i++)
{
b[i]=a;
}
fclose(pt_f);
for(i=0;i<n-1;i++)
{
if(b[i]==b[1])
dop[i]=b[i]
else
printf("\n ku = %6.1d", ku);
}
{ki=i;

#include <iostream>
 
template< typename T >
void delete_element(T **, size_t *, size_t);
 
int main()
{
    size_t size;
 
    std::cout << "Enter size: ";
    std::cin >> size;
 
    int *arr = new int [size];
 
    std::cout << "Enter arr:" << std::endl;
 
    for (size_t i = 0; i < size; ++i)
        std::cin >> arr[i];
 
    int index;
 
    std::cout << "Enter index of deleted element (0 - " << size - 1 << "): ";
    std::cin >> index;
 
    delete_element(&arr, &size, index);
 
    std::cout << "New array: ";
 
    for (size_t i = 0; i < size; ++i)
        std::cout << arr[i] << "  ";
 
    std::cout << std::endl;
 
    return 0;
}
 
template< typename T >
void delete_element(T **arr, size_t *size, size_t delete_index)
{
    T *new_arr = new T [*size - 1];
 
    for (size_t i = 0, j = 0; i < *size; ++i)
        if (i != delete_index)
            new_arr[j++] = (*arr)[i];
 
    delete [] *arr;
    *arr = new_arr;
    --*size;
}