C语言指针和传参基本的实验

 

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#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
int main(void)
{
int i;
int *pi;
printf("int *pi creat------\n");
printf ("pi = %d\n",pi);
// printf ("*pi = %d\n",*pi);
printf("after pi = &i------\n");
pi = &i;

printf ("i = %d\n",i);
printf ("pi = %d\n",pi);
printf ("*pi = %d\n",*pi);

int **ppi;
printf("int **ppi creat------\n");
printf ("ppi = %d\n",ppi);
// printf ("*ppi = %d\n",*ppi);
// printf ("**ppi = %d\n",**ppi);

ppi = π
printf("after ppi = &pi------\n");
printf ("ppi = %d\n",ppi);
printf ("*ppi = %d\n",*ppi);
printf ("**ppi = %d\n",**ppi);
return 0;
}

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