Sample C Program To Swap Two Numbers Using & Without Temporary Variables.

#include <stdio.h>
#include <conio.h>

main()
{
    int x, y, temp;
    printf("Enter the value of x and y ");
    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);
    getch();
    return 0;
}

OUTPUT:

Enter the value of x and y 2
4
Before Swapping
x = 2
y = 4
After Swapping
x = 4
y = 2

C Program To Swap Two Numbers Without Using Temp Variable.

#include <stdio.h>

main()
{
    int a, b;
    printf("Enter two numbers to swap ");
    scanf("%d %d", & a, & b);
    a = a + b;
    b = a - b;
    a = a - b;
    printf("a = %d\nb = %d\n",a,b);
    return 0;
}

OUTPUT:

Enter two numbers to swap 2
4
a = 4
b = 2

C Program To Swap Two Numbers Using Pointers.

# include <stdio.h>

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;
}

C Program To Swap Two Numbers Using Call By Reference

# include <stdio.h>

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 Program To Swap Two Numbers Using Bitwise Operator XOR.

# include <stdio.h>

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;
}

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