Question

#include <iostream>

int* fib(int);

int main()
{
    int count;
    std::cout<<"enter number up to which fibonacci series is to be printed"<<std::endl;
    std::cin>>count;
    int *p=new int[count];
    p=fib(count);
    int i;
    for(i<0;i<=count;i++)
        std::cout<<p[i]<<std::endl;
    return 0;
}

int* fib(int d)
{
    int *ar=new int[d];
    int p=-1,q=1,r;
    int j;
    for(j=0;j<=d;j++)
    {
        r=p+q;
        ar[j]=r;
        p=q;
        q=r;
    }
    return ar;
    delete ar;
}

Why am I not able to print the whole array of Fibonacci series in this way?

Answer 1

Several issues with your code

for(i<0;i<=count;i++)

should actually be

for(i=0;i<count;i++)

and

for(j=0;j<=d;j++)

must read

for(j=0;j<d;j++)

And remove the line

delete ar;

since it does not have any effect after the return statement. Additionally you can get rid of the instantiation

int *p=new int[count];

in main() since this is done in your fib function also. As it stands, you leak the memory you just allocated.