rolldice问题

[coolage31]

#include <iostream>
#include <cstdlib>
using namespace std;

int rolldice( void );
int main()
{
int gamestatus, sum, mypoint;
unsigned seed;
cout<<"Please enter an unsigned integer:";
cin>>seed;
srand(seed); //这个函数是怎么调用的？
sum = rolldice();
switch( sum )
{
case 7:
case 11:
gamestatus = 1;
case 2:
case 3:
case 12:
gamestatus = 2;
break;
default:
gamestatus = 0;
mypoint = sum;
cout<<"point is"<<mypoint<<endl;
break;
}
while ( gamestatus == 0 )
{
sum = rolldice();
if ( sum == mypoint)
gamestatus = 1;
else
if ( sum == 7 )
gamestatus = 2;
}
if ( gamestatus == 1 )
cout<<"player wins\n";
else
cout<<"player loses\n";
cin.get();
return 0;
}

int rolldice( void )
{
int die1, die2, worksum;
die1 = 1 + rand()%6; //这个rand（）是怎么运行的？
die2 = 1 + rand()%6;
worksum = die1 + die2;
cout<<"player rolled"<<die1<<'+'<<die2<<'='<<worksum<<endl;
return worksum;
}

[coolage31]

请各位高人指点下~thx

[yixiao386]

Seed the random-number generator with current time so that
the numbers will be different every time we run.

[coolage31]

？？？
这两个是不是传说中的库函数啊

[coolage31]

taodm
今天你不在么