NO.113 指针变量赋值

我爱橙

Q：设p1和p2是指向同一个字符串的指针变量，c为字符变量，则以下不能正确执行的赋值语句是
A.c=*p1+*p2;   //指针不能计算
B.p2=c;
C.p1=p2;
D.c=*p1*(*p2);

BCD尝试运行程序了，但都卡在设计p1和p2是指向同一个字符串的指针变量上了QAQ



B.

#include <stdio.h>
#include <math.h>

int main()
{
      char *p1=*p2"crazy",c;
      p2=c;
          printf("p1=%c\n",p1);//p1=
          printf("*p1=%c\n",*p1);//*p1=
          printf("p2=%c\n",p2);//p2=
          printf("*p2=%c\n",*p2);//*p2=
         
     

        return 0;
        
}

6        17       
[Error] 'p2' was not declared in this scope
7        10       
[Error] 'c' was not declared in this scope


C.

#include <stdio.h>
#include <math.h>

int main()
{
      char *p1=*p2="crazy",c;
      p1=p2;
          printf("p1=%c\n",p1);//p1=
          printf("*p1=%c\n",*p1);//*p1=
          printf("p2=%c\n",p2);//p2=
          printf("*p2=%c\n",*p2);//*p2=
         
     

        return 0;
        
}

6        17       
[Error] 'p2' was not declared in this scope



D.

#include <stdio.h>
#include <math.h>

int main()
{
      char *p1=*p2="crazy,c;
      c=*p1*(*p2);
          printf("p1=%c\n",p1);//p1=
          printf("*p1=%c\n",*p1);//*p1=
          printf("p2=%c\n",p2);//p2=
          printf("*p2=%c\n",*p2);//*p2=
         
     

        return 0;
        
}

6        17       
[Error] 'p2' was not declared in this scope
7        7       
[Error] 'c' was not declared in this scope