Someone with c++ knowledge please help

Im using visual c++ 2008 express edition from microsoft

Write a program that reads in 16 values from the keyboard and tests whether they form a magic square when put into a 4x4 array. You need to rest two features :

-does each of the numbers 1,2,...,16 occur in the user input
-When the numbers are put into a square, are the sums of the rows, columns, and diagonals equal to eachother?

a magic square is when the sum of the elements in each row, column and in the two diagonals have the same value.

(define (magic-square? n0 n1 n2 n3 n4 n5 n6 n7 n8 n9 n10 n11 n12 n13)
    (= (+ n0 n1 n2 n3)
       (+ n4 n5 n6 n7)
       (+ n8 n9 n10 n11)
       (+ n12 n13 n14 n15)
       (+ n0 n4 n8 n12)
       (+ n1 n5 n9 n13)
       (+ n2 n6 n10 n12)
       (+ n3 n7 n11 n13)))

You do the rest.