# C 程序：使用指针查找最大的三个数字 > 原文： [https://beginnersbook.com/2019/02/c-program-to-find-the-largest-of-three-numbers-using-pointers/](https://beginnersbook.com/2019/02/c-program-to-find-the-largest-of-three-numbers-using-pointers/) 在本教程中，我们将编写一个 C 程序，使用指针查找三个输入数字中最大的一个。 ## 使用指针查找最大数字的程序 在下面的程序中，我们有三个整数`num1`，`num2`，`num3`。我们已将这三个数字的地址分别赋给三个指针`p1`，`p2`，`p3`。之后我们使用[`if else`语句](https://beginnersbook.com/2014/01/c-if-statement/)对存储在指针指向的地址处的值进行了比较。 ```c #include <stdio.h> int main() { int num1, num2, num3; int *p1, *p2, *p3; //taking input from user printf("Enter First Number: "); scanf("%d",&num1); printf("Enter Second Number: "); scanf("%d",&num2); printf("Enter Third Number: "); scanf("%d",&num3); //assigning the address of input numbers to pointers p1 = &num1; p2 = &num2; p3 = &num3; if(*p1 > *p2) { if(*p1 > *p3) { printf("%d is the largest number", *p1); } else { printf("%d is the largest number", *p3); } } else { if(*p2 > *p3) { printf("%d is the largest number", *p2); } else { printf("%d is the largest number", *p3); } } return 0; } ``` **输出：**  #### 相关 C 示例 1. [C 程序：使用指针来统计字符串中的元音和辅音](https://beginnersbook.com/2019/02/c-program-to-count-vowels-and-consonants-in-a-string-using-pointer/) 2. [C 程序：使用指针打印字符串](https://beginnersbook.com/2019/02/c-program-to-print-string-using-pointer/) 3. [C 程序：使用指针交换两个数字](https://beginnersbook.com/2019/02/c-program-to-swap-two-numbers-using-pointers/) 4. [C 程序：创建初始化并访问指针变量](https://beginnersbook.com/2019/02/c-program-to-create-initialize-and-access-a-pointer-variable/) 5. [C 程序：查找最大的三个数字而不使用指针](https://beginnersbook.com/2014/06/c-program-to-find-greatest-of-three-numbers/)