initializing an array

[davidm]

Write your question here.

#include <iostream>
using namespace std;

int main()
{
	int fibonachi[20]={0,1,1,2,3,5,8,13,21,34,55,89,144,233,377,610,987,1597,2584,4181};
	int arr[20];
	int sum=0;
	int maxdif=0;
	for(int i=0;i<20;i++)
	{
		cin>>arr[i];
	}
	for(int j=0;j<20;j++)
	{
		if(arr[j]==fibonachi[j])
		{
			sum++;
		}
		maxdif=arr[j]-fibonachi[j];
		int temp=arr[j+1]-fibonachi[j+1];
		if(maxdif<0)
		{
			maxdif*=-1;
		}
		if(temp<0)
		{
			temp*=-1;
		}
		while(j!=19)
		{
		if(temp>=maxdif)
		{
			maxdif=temp;
		}
		}
	}
	cout<<"The quantity of fibonachi nums: "<<sum<<endl;
	cout<<"The biggest difference: "<<maxdif;
	system("pause");
	return 0;
}

why ant i initialize arr??

[TarikNeaj]

There is nothing wrong with your arrays they're all fine. Problem is here

while(j!=19)
{
	if(temp>=maxdif)
	{
		maxdif=temp;
	}
}

Thats an infinite loop. J is 0 to start with, once it enters that while loop. J never changes, so J will never be 19, so that while loop will run forever.

[davidm]

#include <iostream>
using namespace std;

int main()
{
	int fibonachi[20]={0,1,1,2,3,5,8,13,21,34,55,89,144,233,377,610,987,1597,2584,4181};
	int arr[20];
	int sum=0;
	int maxdif=0;
	for(int i=0;i<20;i++)
	{
		cin>>arr[i];
	}
	for(int j=0;j<20;j++)
	{
		if(arr[j]==fibonachi[j])
		{
			sum++;
		}
		if(j==19)
		{
			break;
		}
		maxdif=arr[j]-fibonachi[j];
		int temp=arr[j+1]-fibonachi[j+1];
		if(maxdif<0)
		{
			maxdif*=-1;
		}
		if(temp<0)
		{
			temp*=-1;
		}
         if(temp>maxdif)
		{
			temp=arr[j+1];
			maxdif=temp;
		}
		
	}
	cout<<"The quantity of fibonachi nums: "<<sum<<endl;
	cout<<"The biggest difference: "<<maxdif<<endl;
	system("pause");
	return 0;
}

fixed it thanks alot.