randomint.cpp

一个漂亮的万花筒游戏

// RandomInt.cpp: implementation of the RandomInt class.
//
//////////////////////////////////////////////////////////////////////
#include <iostream.h>
#include <string.h>
#include <time.h>
#include "RandomInt.h"

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

RandomInt::RandomInt(int a,int b)
{
	SetInterval(a,b);

}
RandomInt::RandomInt(int a,int b,unsigned int s)
{
	SetInterval(a,b);
	SetSeed(s);
}
void RandomInt::SetInterval(int a,int b)
{
if(a>b)
{
cerr<<"Bad RandomInt number interval:"<<a
<<"..."<<b<<endl;
exit(1);
}
else{
Low = a;
High = b;
}
}

void RandomInt::SetSeed(unsigned int s)
{
srand(s);

}
int RandomInt::Draw()
{
int IntervalSize =GetHigh() - GetLow() +1;
int RandomIntOffset = rand() % IntervalSize;
int Number = GetLow() + RandomIntOffset;
return Number;
}
int RandomInt::GetLow()
{
return Low;
}
int RandomInt::GetHigh()
{
return High;
}