扶老奶奶过街

#include <cstdio>
int main()
{
    int aa; 
    int flag =0;
    for(int i=0; i< 5;i++)
    {
        char ch=‘A‘+ i;
        int logical= (ch != ‘A‘ && ch != ‘E‘)+ (ch ==‘C‘ || ch==‘E‘) + (ch ==‘C‘ || ch== ‘D‘)+ (ch!= ‘C‘ && ch!= ‘B‘) + (ch!=‘E‘);
        if(logical == 2)
        {
            if(flag)
            {
                printf(" ");
            }
            printf("%c", ‘A‘+ i);
            flag =1;
        }
    }
    return 0;
}