编辑代码

#include <stdio.h>
int main () {
    int urn[5]={100, 200, 300, 400, 500};
    int *ptr1, *ptr2, *ptr3;

    ptr1=urn;
    ptr2=&urn[2];

    //加法
    printf("ptr3=ptr1+4= %p/n",ptr3=ptr1+4);
    printf("ptr3==&urn[4] is %b/n", ptr3==&urn[4])
    //递增
    printf("ptr1++= %p/n",ptr1++);
}