data structures and program design

1.Complete the program that solves the Eight Queens problem.  The program’s output should look similar to:
 Where a 1 represents a queen chess piece on the board, and a 0 represents an empty square on the board.
2.  Design and implement a class of postfix calculators. Use the algorithm given on page 374 to evaluate postfix expressions, as entered into the calculator. Use only the operators +, -, *, %, and /. Assume that the postfix expressions have single digit numbers in the expression and are syntactically correct.

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