C语言 内存布局

执行结果截图：

 

 

 可以将执行结果截图比对如下的内存布局表（注意：执行结果截图中地址绝对值小的，反而要当作表里的高地址来看，原因待探讨）：

 

 

 代码：

#include "stdio.h"
#include "stdlib.h"
void func(void);

int global_uninit_var;
int global_init_var1 = 520;
int global_init_var2 = 880;
char * global_str1 = "abc";

void func(void)
{
;
}

int main(void)
{
    int local_var1;
    int local_var2;
    char fixed_array[] = {'a','b','c'};

    static int static_uninit_var;
    static int static_init_var = 456;

    char * local_str2 = "I love Johnny's Blog garden!";
    char * local_str3 = "You are right!";

    int * malloc_var = (int *)malloc(sizeof(int));
    if(NULL == malloc_var)
    {
        exit(1);
    }

    printf("addr of local_var1 -> %p\n", &local_var1);
    printf("addr of local_var2 -> %p\n", &local_var2);
    printf("addr of fixed_array -> %p\n", fixed_array);
    
    printf("addr of malloc_var -> %p\n", malloc_var);

    printf("addr of static_uninit_var -> %p\n", &static_uninit_var);
    printf("addr of global_uninit_var -> %p\n", &global_uninit_var);

    printf("addr of local_str3 -> %p\n", local_str3);
    printf("addr of local_str2 -> %p\n", local_str2);
    printf("addr of global_str1 -> %p\n", global_str1);

    printf("addr of static_init_var -> %p\n", &static_init_var);
    printf("addr of global_init_var2 -> %p\n", &global_init_var2);
    printf("addr of global_init_var1 -> %p\n", &global_init_var1);
    printf("addr of func -> %p\n", func);

    free(malloc_var);

    return 0;
}