Реализовать поиск по заданному полю в массиве пользовательского типа (структуры)

#include <iostream> 
 
typedef struct Rec
{
    int n1;
    int n2;
    int bf : 4;
} REC;
 
using namespace std;
 
const int N = 5;
 
static REC* g_prec = nullptr;
 
void init_prec()
{
    for (int i = 0; i < N; i++)
    {
        REC* ptemp = new REC[i + 1];
        if (g_prec != NULL)
            std::memcpy(ptemp, g_prec, sizeof(REC) * i);
 
        std::cout << "n1 = "; cin >> ptemp[i].n1;
        std::cout << "n2 = "; cin >> ptemp[i].n2;
        std::cout << "======================================" << endl;
 
        ptemp[i].bf = std::rand() % 5 + 1;
 
        if (ptemp != nullptr) g_prec = ptemp;
    }
 
    REC* ptemp = new REC[N + 1];
    std::memcpy(ptemp, g_prec, sizeof(REC) * N);
    ptemp[N].n1 = ptemp[N].n2 = -1; g_prec = ptemp;
}
 
void print_prec()
{
    for (int i = 0; g_prec[i].n1 != -1; i++)
        std::cout << "i = " << i << " n1 = " << g_prec[i].n1 << " " << " n2 = " << \
            g_prec[i].n2 << " " << " bf = " << g_prec[i].bf << endl;
 
    std::cout << endl << endl;
}
 
void lookup_prec(const int n1, const int n2)
{
    for (int i = 0; g_prec[i].n1 != -1; i++)
        if (g_prec[i].n1 == n1 && g_prec[i].n2 == n2)
            std::cout << "i = " << i << " n1 = " << g_prec[i].n1 << " " << " n2 = " << \
                g_prec[i].n2 << " " << " bf = " << g_prec[i].bf << endl;
 
    std::cout << endl << endl;
}
 
int main()
{
    init_prec(); print_prec();
 
    int n = 0, m = 0;
    std::cout << "n = "; cin >> n;
    std::cout << "m = "; cin >> m;
 
    lookup_prec(n, m);
 
    std::cin.get();
    std::cin.get();
}

#include <cstring>
#include <cstdlib>