指针在函数中的传递

#include <stdio.h>

char m[]="12345";

int test(char **FPt)
{
  printf("m =%x \n",m);
  *FPt=m;
}

void main()
{
  char *t=0;
  printf("t1 == %x \n",t);
  test(&t);
  printf("t2 == %x \n",t);
  printf("%s\n",t);
}

// 运行结果：

[root@localhost tmp]# ./test2
t1 == 0 
m =80496e4 
t2 == 80496e4 
12345