我的c漏洞

传入指针参数

 1 #include<stdio.h>
 2 #include<stdlib.h>
 3 void READ(int *a)
 4 {
 5         scanf("%d",a);
 6 }
 7 int main()
 8 {
 9         int a;
10         READ(&a);
11         printf("a=%d\n",a);
12 
13         int b,*c,*d;
14         scanf("%d",&b);
15         //*c = b; //error,c还未分配空间
16         c = &b;//right, c指向b
17         printf("c = %d\n",*c);
18 
19         d = (int*)malloc(sizeof(int));
20         *d = b;//right,已经分配空间
21         printf("d = %d\n",*d);
22 
23 }