输出char*的指针时为什么会发生段错误

#include <stdio.h>


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


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

//对应的汇编代码，可以看出这里的地址是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