CONTRACTS
The c2.sol in contracts contains the contract for  crowdfunding.
c2.sol contains functions to create a campaign ,to check the number of active campaigns ,the ID of active campaigns.
Funders is mapped in such  a way that if you enter the campaign id and address of funder it will provide you with the amount funded.
c2.sol also contains a function which will provide you the campaign details if you enter the campaign ID.
c2.sol contains a payable function where funders can fund amount to a campaign only once.