Question

write a program to assign 5 and 6 two variables A and B respectively and interchange them after interchanging A and B will be 6 and 5 respectively in html​

Answer 1

Answer:

program to swap two numbers with and without using third variable, using pointers, functions (Call by reference) and using bit-wise XOR operator. Swapping means interchanging. If the program has two variables a and b where a = 4 and b = 5, after swapping them, a = 5, b = 4. In the first C program, we use a temporary variable to swap two numbers.

Swapping of two numbers in C

#include <stdio.h>

int main()

{

int x, y, t;

printf("Enter two integers\n");

scanf("%d%d", &x, &y);

printf("Before Swapping\nFirst integer = %d\nSecond integer = %d\n", x, y);

t = x;

x = y;

y = t;

printf("After Swapping\nFirst integer = %d\nSecond integer = %d\n", x, y);

return 0;

}

Download Swap numbers program.

The output of the program:

Enter two integers

23

45

Before Swapping

First integer = 23

Second integer = 45

After Swapping

First integer = 45

Second integer = 23

Swapping of two numbers without third variable

You can also swap two numbers without using third variable. In this case C program will be as follows:

#include <stdio.h>

int main()

{

int a, b;

printf("Input two integers (a & b) to swap\n");

scanf("%d%d", &a, &b);

a = a + b;

b = a - b;

a = a - b;

printf("a = %d\nb = %d\n",a,b);

return 0;

}