輸出char*的指針時為什麼會發生段錯誤

#include <stdio.h>


int main()
{
	char* p1 = 1;          
	char* p2 = '1';


    printf("p1 = %c\n", *p1);  //段錯誤 
	printf("p2 = %c\n", *p2);  //段錯誤
    
    return 0;
}
           

//對應的彙編代碼，可以看出這裡的位址是0x1和0x31

	char* p1 = 1;          
 80483cd:	c7 44 24 1c 01 00 00 	movl   $0x1,0x1c(%esp)    
 80483d4:	00 
	char* p2 = '1';
 80483d5:	c7 44 24 18 31 00 00 	movl   $0x31,0x18(%esp)
 80483dc:	00