VS2008编译C代码，不识别randomize()函数
程序代码：#include
#include
#include
#include
#define N 30000
void main()
{
double e=0.1,b=0.5,c,d;
long int i;
float x,y;
int c2=0,d2=0;
puts("*********************************************");
puts("\n >> Result of Regular Polygon Approximating:");
for(i=6;;i*=2)
{
d=1.0-sqrt(1.0-b*b);
b=0.5*sqrt(b*b+d*d);
if(2*i*b-i*e<1e-15) break;
e=b;
}
printf("------------------------------------------");
printf(" >> pi=%.15lf\n",2*i*b);
printf(" >> The number of edges of required polygon:%ld\n",i);
printf("------------------------------------------");
randomize();
while(c2++<=N)
{
x=random(101);
x=random(101);
if(x*x+y*y<=10000)
d2++;
}
puts("\n >> Result of Random Number Method:");
printf("------------------------------------------");
printf(" >> pi=%f\n",4.*d2/N);
printf("------------------------------------------");
puts("\n Press any key to quit...");
getch();
}
