C / C ++中的指针算术
指针算术用于以C语言实现算术运算，例如加减法，增量等。有四种指针算法，例如加法，减法，增量和减量。在32位计算机中，它将值增加或减少2，并将增加或减少2*数字。在64位计算机中，它将值增加或减少4，并将增加或减少4*数字。
这是C语言中的指针算术示例，
示例
#include<stdio.h>
int main() {
int val = 28;
int *pt;
pt = &val;
printf("Address of pointer : %u\n",pt);
pt = pt + 5;
printf("Addition to pointer : %u\n",pt);
pt = pt - 5;
printf("Subtraction from pointer : %u\n",pt);
pt = pt + 1;
printf("Increment to pointer : %u\n",pt);
pt = pt - 1;
printf("Decrement to pointer : %u\n",pt);
return 0;
}输出结果
Address of pointer : 3938439860 Addition to pointer : 3938439880 Subtraction from pointer : 3938439860 Increment to pointer : 3938439864 Decrement to pointer : 3938439860
在上述程序中，算术运算（加法，减法等）应用于指针变量*pt。
int *pt;
pt = &val;
printf("Address of pointer : %u\n",pt);
pt = pt + 5;
printf("Addition to pointer : %u\n",pt);
pt = pt - 5;
printf("Subtraction from pointer : %u\n",pt);
pt = pt + 1;
printf("Increment to pointer : %u\n",pt);
pt = pt - 1;
printf("Decrement to pointer : %u\n",pt);