4.3. memcmp

int memcmp( const void *v1, const void *v2, size_t size);

memcmp compares the first `size' characters of v1 with v2, and returns as with strcmp.

For example, to compare two arrays of double:

        double x[NMAX], y[NMAX];
        int n; /* number of elements used */
        ...
        if( memcmp( x, y, n * sizeof(double)) == 0)
            do_something; /* arrays contain the same data */
        else
            do_something_else;