我有以下代码

char buffer[1024];
void *temp= (void *)(buffer + 4);
int *size= (int *)temp;


我相信可以通过将temp更改为buffer来简化第三行。
我以为下列情况之一是正确的,但都给了我一个错误(分段错误)。

int *size = (int *)(buffer + 4)


要么

int *size = (int *)*(buffer + 4)


正确答案是什么?指针正在杀死我。

最佳答案

没有段错误地运行此代码。注释和打印输出将给出一些表示。

int main (void)
{
 char buffer[11] = {'f', 'e', 'e', 'd', 't', 'h', 'e', 'b', 'a', 'b', 'e'} ;


 printf("Buffer's address in the memory:0x%x\n", buffer); //all three are the same
 printf("Buffer's address in the memory:0x%x\n", & buffer); //all three are the same
 printf("Buffer's address in the memory:0x%x\n", & buffer[0]); //all three are the same

 unsigned char a;
 for (a=0;a<11;a++)
  printf( "%c", buffer[a]);


 void *temp= (void *)(buffer + 4);
 int * size= (int *)temp;

 printf ("\ntemp:0x%x\n", temp);
 printf ("size:0x%x\n", size);
 printf ("size:%c\n", *size);

 size    = (int *)(buffer + 4);




 printf ("\n(int *)*(buffer + 4): 0x%x\n",(int *)*(buffer + 4));
 size  = *(char *)(buffer + 4);
 printf("size:%c\n",size); // 't''s ASCII code
 printf("size:0x%x\n",size); // 't'
}

关于c - C编程,关于指针的困惑,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/24592047/

10-12 16:12
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