Swapping of two number

Swapping of two numbers in c

#include

 int main() {

 int x, y, temp;

 printf("Enter the value of x and y\n");

 scanf("%d%d", &x, &y);

 printf("Before Swapping\nx = %d\ny = %d\n",x,y);

 temp = x; x = y; y = temp;

 printf("After Swapping\nx = %d\ny = %d\n",x,y);

 return 0;

 }

Swapping of two numbers without third variable: You can also swap two numbers without using temp or temporary or third variable. In that case c program will be as shown :-

#include  

 int main() { 

 int a, b; 

 printf("Enter two integers 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; 

}

Swap two numbers using pointers

#include  

 int main() { 

 int x, y, *a, *b, temp;

 printf("Enter the value of x and y\n"); 

 scanf("%d%d", &x, &y); 

 printf("Before Swapping\nx = %d\ny = %d\n", x, y);

 a = &x; 

 b = &y;

 temp = *b; 

 *b = *a;

 *a = temp; 

 printf("After Swapping\nx = %d\ny = %d\n", x, y);

 return 0;

 }

Swapping numbers using call by reference

#include  

 void swap(int*, int*);

 int main() { 

 int x, y;

 printf("Enter the value of x and y\n"); 

 scanf("%d%d",&x,&y);

 printf("Before Swapping\nx = %d\ny = %d\n", x, y);

 swap(&x, &y); 

 printf("After Swapping\nx = %d\ny = %d\n", x, y);

 return 0; 

} 

 void swap(int *a, int *b) { 

 int temp; 

 temp = *b; 

 *b = *a;

 *a = temp; 

 }

C programming code to swap using bitwise XOR

#include  

 int main() { 

 int x, y;

 scanf("%d%d", &x, &y);

 printf("x = %d\ny = %d\n", x, y);

 x = x ^ y; 

 y = x ^ y;

 x = x ^ y;

 printf("x = %d\ny = %d\n", x, y);

 return 0; 

}

Output of code: