ACM如何产生各种随机数

如何产生各种随机数

产生int型随机数  

#include<stdio.h>

#include<stdlib.h>

#include<string.h>

#include<math.h>

#include<time.h>

int main( )

{

    //freopen( "1.in","r",stdin );

    //freopen( "3.out","w",stdout );

    srand( time( NULL ) );

    int t,n = 10 ;

    while( n-- )

    {

           printf( "%d ",rand() );

           }

    return 0;

}

产生随机小数

#include<stdio.h>

#include<stdlib.h>

#include<string.h>

#include<math.h>

#include<time.h>

int main( )

{

    //freopen( "1.in","r",stdin );

    //freopen( "3.out","w",stdout );

    srand( time( NULL ) );

    int t,n = 10 ;

    while( n-- )

    {

           printf( "%.6lf ",rand()*1.0 / 100 );

           }

    return 0;

}

产生任意范围的数

#include<stdio.h>

#include<stdlib.h>

#include<string.h>

#include<math.h>

#include<time.h>

int main( )

{

    //freopen( "1.in","r",stdin );

    freopen( "3.out","w",stdout );

    srand( time( NULL ) );

    int t = 99,n = 10 ;

    while( n-- )

    {

           printf( "%d ",rand() % t );

           }

    return 0;

}

产生字符串

#include<stdio.h>

#include<stdlib.h>

#include<string.h>

#include<math.h>

#include<time.h>

int main( )

{

    //freopen( "1.in","r",stdin );

    freopen( "3.out","w",stdout );

    srand( time( NULL ) );

    int t = 99,n = 10 ;

    while( n-- )

    {

           printf( "%c ",rand() % 26 + 'A' );

           }

    return 0;

}