指针的大小

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#include <stdio.h>typedef struct str_test{    int a;    char b;    float c;}str_test;str_test* str_test_ptr;int * int_ptr;int main(void){    printf("************0**********\n");    printf("sizeof(str_test_ptr)：%d\n",sizeof(str_test_ptr));    printf("sizeof(int_ptr)：%d\n",sizeof(int_ptr));    printf("sizeof(str_test_ptr)：%d\n",sizeof(str_test_ptr));    printf("sizeof(int_ptr)：%d\n",sizeof(int_ptr));}

输出结果

************0**********
sizeof(str_test_ptr)：8
sizeof(int_ptr)：8

/usercode/file.cpp: In function ‘int main()’:
/usercode/file.cpp:14:62: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘long unsigned int’ [-Wformat=]
     printf("sizeof(str_test_ptr)：%d\n",sizeof(str_test_ptr));
                                                              ^
/usercode/file.cpp:15:52: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘long unsigned int’ [-Wformat=]
     printf("sizeof(int_ptr)：%d\n",sizeof(int_ptr));
                                                    ^
所以指针大小都是4字节大小，在32位系统中

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