用c语言Write a program to Swap Two Numbers using Call by Reference.
时间: 2023-11-28 17:48:09 浏览: 45
以下是用 C 语言编写的通过引用调用来交换两个数字的程序:
```c
#include <stdio.h>
// 函数原型
void swap(int *a, int *b);
int main()
{
int num1, num2;
printf("Enter two numbers to swap: ");
scanf("%d %d", &num1, &num2);
// 调用 swap 函数
swap(&num1, &num2);
printf("After swapping, num1 = %d and num2 = %d", num1, num2);
return 0;
}
// 通过引用调用来交换两个数字
void swap(int *a, int *b)
{
int temp;
temp = *a;
*a = *b;
*b = temp;
}
```
在这个程序中,我们首先定义了一个函数 `swap`,它采用了两个整型指针作为参数。在主函数中,我们输入了两个整数,并将它们的地址传递给 `swap` 函数。在 `swap` 函数中,我们使用了一个临时变量来存储一个数字,然后将第一个数字的值赋给第二个数字,将第二个数字的值赋给第一个数字。最后,在主函数中打印交换后的数字。
相关问题
write a program to swap two number
Sure, here's an example program in Python to swap two numbers:
```
# take two numbers as input from the user
num1 = float(input("Enter the first number: "))
num2 = float(input("Enter the second number: "))
# print the original numbers
print("Original numbers: num1 =", num1, ", num2 =", num2)
# swap the numbers
temp = num1
num1 = num2
num2 = temp
# print the swapped numbers
print("Swapped numbers: num1 =", num1, ", num2 =", num2)
```
This program takes two numbers as input from the user, stores them in variables `num1` and `num2`, and then swaps their values using a temporary variable `temp`. Finally, it prints the original and swapped numbers for verification.
write a C program to swap two number 数据要手动输入
Certainly! Here's a modified version of the program that allows the user to input the two numbers to swap:
```c
#include <stdio.h>
void swap(int *a, int *b);
int main() {
int num1, num2;
printf("Enter the first number: ");
scanf("%d", &num1);
printf("Enter the second number: ");
scanf("%d", &num2);
printf("Before swapping: num1 = %d, num2 = %d\n", num1, num2);
// call the swap function to swap the values
swap(&num1, &num2);
printf("After swapping: num1 = %d, num2 = %d\n", num1, num2);
return 0;
}
void swap(int *a, int *b) {
int temp;
temp = *a;
*a = *b;
*b = temp;
}
```
In this program, we use the `scanf` function to read in two integers from the user, which are stored in the variables `num1` and `num2`. Then, we print out the original values of the variables before swapping them. The `swap` function is the same as in the previous program, which takes in two integer pointers and swaps their values. Finally, we print out the swapped values to confirm that the program works as expected.
I hope that helps! Let me know if you have any further questions.