C 程序：通过递增指针来访问数组元素（遍历数组）

原文：https://www.studytonight.com/c/programs/pointer/pointer-increment-and-decrement

数组的名称是指数组的基地址。

这里我们有一个教程来了解指针算法是如何工作的？

下面是一个使用指针增量访问数组元素的程序。

#include <stdio.h>

const int MAX = 3;  // Global declaration
int main()
{
    printf("\n\n\t\tStudytonight - Best place to learn\n\n\n");
    int var[] = {100, 200, 300};
    int i, *ptr;

    /* 
        storing address of the first element 
        of the array in pointer variable
    */
    ptr = var;

    for(i = 0; i < MAX; i++)
    {
        printf("\n\n\nAddress of var[%d] = %x ", i, ptr);
        printf("\nValue of var[%d] = %d ", i, *ptr);

       // move to the next location
        ptr++;
    }
    printf("\n\n\t\t\tCoding is Fun !\n\n\n");
    return 0;
}

输出:

通过递减指针遍历数组元素

下面是一个使用指针递减来访问数组元素的程序。

#include <stdio.h>

const int MAX = 3;  // Global declaration
int main()
{
    printf("\n\n\t\tStudytonight - Best place to learn\n\n\n");
    int var[] = {100, 200, 300};
    int i, *ptr;

    /* 
        storing address of the last element 
        of the array in pointer variable
    */
    ptr = &var[MAX-1];

    for(i = MAX; i > 0; i--)
    {
        printf("\n\n\nAddress of var[%d] = %x ", i, ptr);
        printf("\nValue of var[%d] = %d ", i, *ptr);

        // move to the previous location
        ptr--;
    }
    printf("\n\n\t\t\tCoding is Fun !\n\n\n");
    return 0;
}

输出: