f4.c

来自「压缩包内内容有：《遗传算法——理论、应用与软件实现》中所附源程序C或C++代码文」· C语言 代码 · 共 43 行

/************************************************  file f4.c  ****/


/* used in random number generator below */
#define MASK 2147483647UL
#define PRIME 65539
#define SCALE 0.4656612875e-9
#define Rand()  (( Seed = ( (Seed * PRIME) & MASK) ) * SCALE )

extern unsigned int Seed;


double eval(str, length, vect, genes)
char str[];	/* string representation			*/
int length;	/* length of bit string				*/
double vect[];	/* floating point representation		*/
int genes;	/* number of elements in vect			*/
{
	register int i;
	register int k;
	double ans;
	double prod;

	ans = 0.0;
	for (i=0; i< genes; i++)
	{
		prod = 1.0;
		for (k = 0; k<4; k++)
			prod *= vect[i];
		ans += (i+1)*prod;
	}

	/* now add Gaussian noise */
	prod = 0.0;
	for (i=0; i<12; i++) prod += Rand();
	prod -= 6.0;

	ans += prod;
	return (ans);
}

/** end of file **/