Даны три квадратных матрицы

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
 
#define SIZE_MATRIX ( 3 )
 
int minimum ( int x, int y ) {
    return ( x < y ? x : y );
}
 
int norma( int* point, size_t n ) {
    size_t i = 1, stop = n * n;
    int max = point[ 0 ];
 
    while ( i < stop ) {
        if ( max < point[ i ] )
            max = point[ i ];
        ++i;
    }
    return max;
}
 
void print( int* point, size_t n ) {
    size_t i = 0, stop = n * n, k = 0;
 
    while ( i < stop ) {
        if ( !k )
            putchar('\n');
        k = ( k == n - 1 ) ? 0 : k + 1;
        printf( "%3d", point[ i++ ] );
    }
    putchar('\n');
    putchar('\n');
}
 
void set_rand( int* point, size_t n ) {
    size_t tmp = n * n * n;
    int *end = point + tmp / n;
 
    while ( point != end )
        *point++ = rand() % tmp;
}
 
int main() {
 
    srand( time( 0 ) );
    int A[ SIZE_MATRIX ][ SIZE_MATRIX ];
    int B[ SIZE_MATRIX ][ SIZE_MATRIX ];
    int C[ SIZE_MATRIX ][ SIZE_MATRIX ];
 
    set_rand( &A[ 0 ][ 0 ], SIZE_MATRIX );
    set_rand( &B[ 0 ][ 0 ], SIZE_MATRIX );
    set_rand( &C[ 0 ][ 0 ], SIZE_MATRIX );
 
    puts("matrix A");
    print( &A[ 0 ][ 0 ], SIZE_MATRIX );
    puts("matrix B");
    print( &B[ 0 ][ 0 ], SIZE_MATRIX );
    puts("matrix C");
    print( &C[ 0 ][ 0 ], SIZE_MATRIX );
    printf
    (   "answer = %i\n",
        minimum
        (
            norma( &A[ 0 ][ 0 ], SIZE_MATRIX ),
            minimum( norma( &B[ 0 ][ 0 ], SIZE_MATRIX ), norma( &C[ 0 ][ 0 ], SIZE_MATRIX ) )
        )
    );
 
    return 0;
}