New programming and problems (c Programming in Linux)

New programming, problems (c Programming in Linux) -- Linux general technology-Linux programming and kernel information, the following is a detailed description. To achieve this function: Count the maximum number and number of occurrences of each array. For the error message, see the end. What is the problem with this program? Thank you.
# Include
Int n;
Int max (a, n)
{
Int a [n];
Int c;
Int imax;
Imax = a [0];
For (c = 0; c {If (imax = a [c];
}
Return (imax );
}

Int com (x, n)
{
Int x [n], y [n], z [n];
Int * p;
Int I, j, k, d, m, max1, max2;
For (I = 0; I {
K = 0;
P = x;
For (j = I + 1; j {
If (* p = x [j])
K = k + 1 ;}
Y = * P;
Z= K;
P ++;
}
Max1 = max (z, n );
For (I = 0; I {If (z= Max1)
Max2 = y;
}
Printf ("% d, % d \ n", max2, max1 );
}

Int main ()
{
Int a1 [] = {8, 5, 5, 6, 5, 8, 11, 12, 0 };
Int a2 [] = {2, 11, 6, 9, 11, 19,5, 0 };
Int a3 [] = {, 0 };
Int a4 [] = {6, 14, 13, 16, 4, 8, 9, 0 };
Int a5 [] = {, 0 };
Int a6 [] = {4, 3, 6, 5, 4, 8, 9, 0 };
Int a7 [] = {5, 16, 2, 2, 11, 15, 16, 2, 0 };
Int * q;
N = 0;
For (q = a1; * q! = 0; q ++)
N = n + 1;
Com (a1, n );
Com (a2, n );
Com (a3, n );
Com (a4, n );
Com (a5, n );
Com (a6, n );
Com (a7, n );
}

Error message:
T18.c: In function 'Max ':
T18.c: 5: warning: declaration of 'A' shadows a parameter
T18.c: In function 'com ':
T18.c: 20: warning: declaration of 'X' shadows a parameter

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