void userInput(char inp[1000])
{


    if((strcmp("undo",inp) == 0)) {
        if(turn==1) {
            printf("You Can't Undo More!\n");
            getInput();
        }
        int iC,iD,jC,jD;
        movesCount--;
        iC = undo[movesCount]/1000;
        iD = undo[movesCount]/100%10;
        jC = undo[movesCount]/10%10;
        jD = undo[movesCount]%10;
        move(iD, iC, jD, jC);
        findKings();
        correspondPrototypeBoard();
        turn-=2;


    }
    else {
        while(strlen(inp)!=4)
        {
            printf("Invalid Input!\n");
            getInput();
        }
        int iCurrent, iDestination, jCurrent, jDestination;
        jCurrent = (int)inp[0] - (int)'A';
        iCurrent = (int)inp[1] - (int)'0';
        jDestination = (int)inp[2] - (int)'A';
        iDestination = (int)inp[3] - (int)'0';
        iDestination = 8 - iDestination;
        iCurrent = 8 - iCurrent;



        if(turn%2!=0 && (piecesBoard[iCurrent][jCurrent]>='A' && piecesBoard[iCurrent][jCurrent]<='Z'))
        {
            printf("White Pieces Turn!\n");
            getInput();
        }

        else if(turn%2==0 && (piecesBoard[iCurrent][jCurrent]>='a' && piecesBoard[iCurrent][jCurrent]<='z'))
        {
            printf("Black Pieces Turn!\n");
            getInput();
        }

        else if(validate(iCurrent, iDestination, jCurrent, jDestination)!=0)
        {
            printErrors(validate(iCurrent, iDestination, jCurrent, jDestination), iCurrent, iDestination, jCurrent, jDestination);
            getInput();

        }



        else if(validateCheck(iCurrent,iDestination,jCurrent,jDestination)==1)
        {
            if(turn%2==1)
                printf("WHITE KING WILL BE CHECKED!\n");
            else if(turn%2==0)
                printf("BLACK KING WILL BE CHECKED!\n");
            getInput();
        }

        else if(validate(iCurrent, iDestination, jCurrent, jDestination)==0)
        {

            capture(iCurrent, iDestination, jCurrent, jDestination);
            trackUndo();
            move(iCurrent, iDestination, jCurrent, jDestination);
            findKings();
            correspondPrototypeBoard();
            stalemate();
            checkmate();



        }
    }

}