如何生成一个随机的0到9的字符值？

[ltrap]

把他赋值给一个CString变量

[handsomerun]

把随机数，除10取模
就是0-9的int形数

然后用CString
的format格式话成CString型

[ltrap]

谢谢，不过我主要是不太会用随机数函数

[syy64]

rand
Generates a pseudorandom number.

int rand( void );

Routine Required Header Compatibility
rand <stdlib.h> ANSI, Win 95, Win NT


For additional compatibility information, see Compatibility in the Introduction.

Libraries

LIBC.LIB Single thread static library, retail version
LIBCMT.LIB Multithread static library, retail version
MSVCRT.LIB Import library for MSVCRT.DLL, retail version


Return Value

rand returns a pseudorandom number, as described above. There is no error return.

Remarks

The rand function returns a pseudorandom integer in the range 0 to RAND_MAX. Use the srand function to seed the pseudorandom-number generator before calling rand.

Example

/* RAND.C: This program seeds the random-number generator
* with the time, then displays 10 random integers.
*/

#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() );
}


Output

6929
8026
21987
30734
20587
6699
22034
25051
7988
10104


Floating-Point Support Routines

See Also srand

[ltrap]

这个time是个什么东西？是个读系统时间的宏？

[ltrap]

这段英文资料应该是msdn上的吧？
顺便问一下怎么查？
我输入关键字搜出来的都是sql上的函数！

[ltrap]

int i=rand();
i=i%10;
m_cResult1=(CString)i;

UpdateData(FALSE);

生成的字符不是数字，而是特殊符号？？？

[一条晚起的虫]

m_cResult1=(CString)i; ？
m_cResult1.format(%d, i);
rand()和srand()都是伪随机数，用time作种子可以保证每次生成的数不一样

[菜牛]

CString str;
str.Format(_T("%d"), rand() % 10);

[ltrap]

我要将i的数值强制转换成字符串然后存进变量阿！

[一条晚起的虫]

m_cResult1.format("%d", i);
将i的值存到m_cResult1了

[BombZhang]

用rand生成一个0到9的随即数，然后把这个数加上'0'即可。

[ltrap]

感谢各位的指导！！！！