(断案）c语言解答

解题思路:

注意事项:

参考代码:

#include<stdio.h>

int main()

{

int a[4]={0},i;

for (i = 0; i < 4; i++)

{

int count = 0;

a[i] = 1;

    a[i-1]=0;

if ((a[1] == 0 && a[3] == 1) || (a[1] == 1 && a[3] == 0))

count++;

if ((a[1] == 0 && a[2] == 1) || (a[1] == 1 && a[2] == 0))

count++;

if ((a[0] == 0 && a[1] == 1) || (a[0] == 1 && a[1] == 0))

count++;

if (a[3] == 0 || a[3] == 1)

count++;

if (count == 4)

{

if (i == 0)

printf("A");

if (i == 1)

printf("B");

if (i == 2)

printf("C");

if (i == 3)

printf("D");

}

}

return 0;

}