c指针学习

#include <stdio.h>

void main()

{

int a1=10;
int a2=11;
int * pa1, * pa2;
pa1 = &a1;
pa2 = &a2;

printf("a1=%d \pa1:%p\n",a1,pa1);
printf("a2=%d \pa2:%p\n",a2,pa2);

*pa1=*pa2;

printf("赋值后\n");

printf("a1=%d\ pa1:%p\n",a1, pa1);
printf("a2=%d\ pa2:%p\n",a2, pa2);

//*pa1=*pa2和a1=a2操作相同

//

pa2=pa1;//把pa1的指针地址复制给了pa2
printf("a1=%d\ pa1:%p\n",a1, pa1);
printf("a2=%d\ pa2:%p\n",a2, pa2);
//指针地址复制，把pa1的指针地址复制给了pa2后现在指针pa1和pa2都指向变量 a1

return 0;
}