c语言布尔变量如何定义,关于布尔变量的用法（新手）

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/*

* =====================================================================================

*

*       Filename: isprime.c

*

*    Description: isprime

*

*        Version: 1.0

*        Created: 04/05/2010 07:53:13 PM

*       Revision: none

*       Compiler: gcc

*

*         Author: Leo Long

*        Company: Leo

*

* =====================================================================================

*/

#include

#include

#define    IS     1

#define    NOT    0

int isprime(int x)

{

int state, i;

state = IS;

for (i = 2; state && i <= (int)sqrt((double)x); i++)

{

state = x % i;

}

if (state)

{

return 1;

}

else

{

return 0;

}

}

int main()

{

int some_number;

scanf("%d", &some_number);

if (isprime(some_number))

{

printf("%d is a prime", some_number);

}

else

{

printf("%d is not a prime", some_number);

}

return 0;

}

这个判断质素的函数也用到了布尔变量

新手闪过.............