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快乐鹦鹉 2004-03-24
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随机数为rand()
随机种子数为srand()
随机种子数为srand()
seayea 2004-03-24
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MSDN的例程：
#include <stdlib.h>
#include <stdio.h>
#include <time.h>
void main( void )
{
int i;
/* Seed the random-number generator with current time so that
* the numbers will be different every time we run.
*/
srand( (unsigned)time( NULL ) );
/* Display 10 numbers. */
for( i = 0; i < 10;i++ )
printf( " %6d\n", rand() );
}
#include <stdlib.h>
#include <stdio.h>
#include <time.h>
void main( void )
{
int i;
/* Seed the random-number generator with current time so that
* the numbers will be different every time we run.
*/
srand( (unsigned)time( NULL ) );
/* Display 10 numbers. */
for( i = 0; i < 10;i++ )
printf( " %6d\n", rand() );
}
rainliuyu 2004-03-23
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N 为随机数范围的上限。
闻缺陷则喜何志丹 2004-03-23
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1,避免随机数相同,可以取当前时间,读文件,读任意内存(如求定义变量,有一定危险).
CTime t = CTime::GetCurrentTime();
int n = t.GetMinute() * 60 + t.GetSecond();
while(n-- > 0)
{
rand();
}
const int N = 100;
int result = rand()%N;
CTime t = CTime::GetCurrentTime();
int n = t.GetMinute() * 60 + t.GetSecond();
while(n-- > 0)
{
rand();
}
const int N = 100;
int result = rand()%N;
