Created using remix-ide: Realtime Ethereum Contract Compiler and Runtime. Load this file by pasting this gists URL or ID at https://remix.ethereum.org/#version=soljson-v0.5.1+commit.c8a2cb62.js&optimize=false&gist=

CaseReg.sol

pragma solidity ^0.5.0;

contract CaseReg{
    
    enum CType {Criminal,Civil,Narcotic,Terririst}
     uint public Pgno = 0 ; // it will increase while adding each case
     
    struct Petition {
        string Prathy; //Accuse
        string Vaadi; //mattavan
        string Tittle; //vishayam   
        CType Casetype; // as 0-3 based on above enum
        string Image; //ipfs image hash
        string WriteUp; //blaa blaaa blaaa
    }
    
    mapping(uint=>Petition) public MPetition; //going to map the petition struct via page no
    
    function AddPetition (string memory _Prathy,string memory _Vaadi,string memory _Tittle,CType _Casetyp,string memory _image,string memory _WriteUp) public {
     Pgno +=1; //page no increament
     MPetition[Pgno]= Petition(_Prathy,_Vaadi,_Tittle,_Casetyp,_image,_WriteUp); //pushing inputs to the structure
    }
    
    
    
}

CreatPolice.sol

pragma solidity ^0.5.0;


contract CrtPolice {
    
    
    
     address owner;
    string password;  //creating a major password
    
    modifier onlyMe{  //modifier named as only me
        require(msg.sender == owner);
        _;
    }
    constructor() public {
        owner=msg.sender;    //declaring ower as message sender
    }
    
    
    
    
    
    
    uint PSNo=0 ; //each station adding it will increase
    struct PoSt{
        string name;
        address StatAddr;
        string Password;
    }
    
    mapping(uint=>PoSt) policemap;
    
    function NewPoSt(string memory _name,address _StatAddr,string memory _Password) public onlyMe{
        PSNo +=1;
        policemap[PSNo] = PoSt(_name,_StatAddr,_Password);
        
        
    }
    
}

MasterPass.sol

pragma solidity ^0.5.0;

 contract MasterPass { //hey
    
    address owner;
    string password;  //creating a major password
    
    modifier onlyMe{  //modifier named as only me
        require(msg.sender == owner);
        _;
    }
    constructor() public {
        owner=msg.sender;    //declaring ower as message sender
    }
    
    function set(string memory _password) public onlyMe {  //password changing function that only done my me 
        password = _password;
    }
    
}

MyContra.sol

pragma solidity ^0.5.0;

contract MyContra {
    string value;
    
    constructor() public{
        value = "Hai";
    }
function set(string memory _value) public {
    value =_value;
} 
function get() public view returns(string memory) {
    return value;    
}
    
}

test.sol

pragma solidity ^0.5.0;

contract c {
    
    address public hai;
    constructor() public {
    hai = msg.sender;    
    }
    }