%p和%x有什么区别吗？

[独孤九剑贰]

#include <stdlib.h>
#include <stdio.h>
int main()
{
unsigned int *p;
p = (unsigned int *)malloc(100);
if(p)
printf("Memory Allocated at: %x",p);
else
printf("Not Enough Memory!\n");
getchar();
p = (unsigned int *)realloc(p,156);
if(p)
printf("Memory Realloc at: %x",p);
else
printf("Not Enough Memory!\n");
free(p);
getchar();
return 0;
}
在linux下编程有警告。
realloc.c: In function ‘main’:
realloc.c:8:10: warning: format ‘%x’ expects argument of type ‘unsigned int’, but argument 2 has type ‘unsigned int *’ [-Wformat=]
printf("Memory Allocated at: %x",p);
^
realloc.c:14:10: warning: format ‘%x’ expects argument of type ‘unsigned int’, but argument 2 has type ‘unsigned int *’ [-Wformat=]
printf("Memory Realloc at: %x",p);
但是用%p后可以解决，我想问下%p和%x有什么区别么？

[whizer]

p打印指针,x打印整数. printf("Memory Realloc at: %x",p); 改成下面应该也能消除 printf("Memory Realloc at: 0x%x",(unsigned int)p);

[Carl_CCC]

区别就是 %p 相当于 0x%x

[angel_su]

64位下结果会不一样，老实点用%p吧...

[max_min_]

%p打印地址的啊！ %x十六进制形式打印 完成不同！

[nadleeh]

引用 楼主 abc594986308 的回复:

#include <stdlib.h> #include <stdio.h> int main() { unsigned int *p; p = (unsigned int *)malloc(100); if(p) printf("Memory Allocated at: %x",p); else printf("Not Enough Memory!\n"); getchar(); p = (unsigned int *)realloc(p,156); if(p) printf("Memory Realloc at: %x",p); else printf("Not Enough Memory!\n"); free(p); getchar(); return 0; } 在linux下编程有警告。 realloc.c: In function ‘main’: realloc.c:8:10: warning: format ‘%x’ expects argument of type ‘unsigned int’, but argument 2 has type ‘unsigned int *’ [-Wformat=] printf("Memory Allocated at: %x",p); ^ realloc.c:14:10: warning: format ‘%x’ expects argument of type ‘unsigned int’, but argument 2 has type ‘unsigned int *’ [-Wformat=] printf("Memory Realloc at: %x",p); 但是用%p后可以解决，我想问下%p和%x有什么区别么？

没什么区别，结果上，唯一的区别的编译器警告的问题

[mLee79]

%p 标准没有格式的规定, 打印出来像 0x%x 0X%08X %08X 啥格式的都有...

[d4shman]

引用 4 楼 max_min_ 的回复:

%p打印地址的啊！ %x十六进制形式打印 完成不同！

版主解释的到位！谢谢~

[AnYidan]

引用 4 楼 max_min_ 的回复:

%p打印地址的啊！ %x十六进制形式打印 完成不同！

%p void *; print as a pointer (implementation-dependent representation).