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possible problem with pointers

uzferry (88)
In this code I have to check whether the number is triangle, square, pentagonal etc. (see project euler 61 problem).
My function checks if a number is one of these and then sets a pointer to point to a certain number, which shows what kind the number is.
The problem is that function never returns 8. I checked if the formula is right, it IS right, I also checked how the function works, it appears to work well and should return 8. I am completely lost. Please help. 
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 #include <iostream>
 #include <cmath>

using namespace std;

int check(int number, int * p) {
    if ((..formula..) and (p[0]==0)) {p[0] = 3; return 3;}
    if ((..formula..) and (p[1]==0)) {p[1] =4; return 4;}
    if ((..formula..) and (p[2]==0)) {p[2]=5; return 5;}
    if ((..formula..) and (p[3]==0)) {p[3]=6; return 6;}
    if ((..formula..) and (p[4]==0)) {p[4]=7; return 7;}
    if ((..formula..) and (p[5]==0)) {p[5]=8; return 8;}
return 0;
}

int main()
{
    static int *p;
    p=new int;
    for (int gh=0; gh<=5; gh++) {p[gh]=0;}

for (int i=1000; i<=9999; i++)
{   int i1=check(i,p);
    if (i1!=0)
    { cout << i << " " << i1 << endl; // HOW COME THIS NEVER COUTS OCTAGONAL (8) NUMBERS
        for (int b=i%100 * 100; b<=i%100 * 100+99; b++)
        {   int b1=check(b,p);
            if (b1!=0)
            {
                for (int c=b%100*100; c<=b%100 * 100+99;c++)
                {   int c1=check(c,p);
                    if (c1!=0)
                    {
                        for (int d=c%100*100; d<=c%100*100+99; d++)
                        {   int d1=check(d,p);
                            if (d1!=0)
                            {
                                for (int e=d%100*100; e<=d%100*100+99; e++)
                                {   int e1=check(e,p);
                                    if (e1!=0)
                                    {
                                         for (int f=e%100*100; f<=e%100*100+99; f++)
                                         {  int f1=check(f,p); 
                                             if ((f1!=0) and (f%100==i/100))
                                             {
                                            
                                                cout << i+b+c+d+e+f << endl;
                                             p[f1-3]=0;}
                                         }
                                    p[e1-3]=0;}
                                }
                            p[d1-3]=0;}
                        }
                    p[c1-3]=0;}
                }
            p[b1-3]=0;}
        }
    p[i1-3]=0;}
}

}
Last edited on
uzferry (88)
please help
ResidentBiscuit (4459)
Dem nests....
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