bit.c

#include <stdio.h>

#define BITNUMBER 32   //int占4个字节
#define N 32000

int a[N/BITNUMBER+1];

void set(int i)
{
        a[i/BITNUMBER]|=1<<(i%BITNUMBER);
}

void clean(int i)
{
        a[i/BITNUMBER]&=~1<<(i%BITNUMBER);
}

int test(int i)   //显示该位值
{
        return (a[i/BITNUMBER]>>(i%BITNUMBER))&1;
}
int main()
{

}