Pzk's first understanding of pointer in learning C language

notes ： 1. The black box represents the computer memory space , Why is the address below the horizontal line bad 4, Because of the definition of int type , One int The type is 4 Bytes , So bad 4;
2. int *p1; // This is the format of defining pointer variables , This is the rule
p1 = &a; // Defined int Type a Then your pointer can only define int Type can be assigned ,
// If you define char a=‘k’; Then you want to define the pointer variable storage a The address of can only be ,
//char *p1; p1=&a; That's how it works

#include <stdio.h>
int main()
{
    
	int a;
	a = 1;
	int b;
	b = 2;
	int c;
	c = 3;

    int *p1;   // This is the format of defining pointer variables , This is the rule 
    p1 = &a;   // Defined int Type a Then your pointer can only define int Type can be assigned ,
               // If you define char a='k'; Then you want to define the pointer variable storage a The address of can only be ,
               //char *p1; p1=&a; That's how it works 
    int *p2;
    p2 = &b;
    
    int *p3;
    p3 = &3;
	return 0;
}