# C 程序：使用指针交换两个数字 > 原文： [https://beginnersbook.com/2019/02/c-program-to-swap-two-numbers-using-pointers/](https://beginnersbook.com/2019/02/c-program-to-swap-two-numbers-using-pointers/) 在本教程中，我们将编写一个 C 程序，使用指针交换两个数字。我们已经涵盖[如何在不使用指针](https://beginnersbook.com/2017/09/c-program-to-swap-two-numbers/)的情况下交换两个数字。 ## 使用指针交换两个数字的 C 示例 ```c /*C program by Chaitanya for beginnersbook.com * Program to swap two numbers using pointers*/ #include <stdio.h> // function to swap the two numbers void swap(int *x,int *y) { int t; t = *x; *x = *y; *y = t; } int main() { int num1,num2; printf("Enter value of num1: "); scanf("%d",&num1); printf("Enter value of num2: "); scanf("%d",&num2); //displaying numbers before swapping printf("Before Swapping: num1 is: %d, num2 is: %d\n",num1,num2); //calling the user defined function swap() swap(&num1,&num2); //displaying numbers after swapping printf("After Swapping: num1 is: %d, num2 is: %d\n",num1,num2); return 0; } ``` **输出：**  #### 相关 C 示例 1. [C 程序：声明，初始化和访问指针](https://beginnersbook.com/2019/02/c-program-to-create-initialize-and-access-a-pointer-variable/) 2. [C 程序：检查`char`是否为字母](https://beginnersbook.com/2017/09/c-program-to-check-whether-a-character-is-an-alphabet-or-not/) 3. [C 程序：将十进制转换为八进制](https://beginnersbook.com/2017/09/c-program-to-convert-decimal-to-octal-number/) 4. [C 程序：查找商和余数](https://beginnersbook.com/2017/09/c-program-to-find-quotient-and-remainder/)