Call By Value And Call By Refrence

Call By Value

#include<stdio.h>
void swap(int,int);

void main()
{
   int a,b;
  
   printf("enter the value of a and b ");
   scanf("%d%d",&a,&b);
   printf("before Swipe a=%d And b=%d",a,b);
   swipe(a,b);
   printf("\nafter swapping a=%d And b=%d",a,b);
}
void swipe(int a,int b)
{
   int temp;
   temp=x;
   x=y;
   y=temp;
  
}

Call By Reference

#include<stdio.h>
void swap(int*,int*);
void main()
{
  int a,b;
  printf("enter value of a and b");
  scanf("%d%d",&a,&b);
  printf("before swap a=%d and b=%d",a,b);
  swap(&a,&b);
  printf("after swapping a=%d and b=%d",a,b);
 
}

swap(int*x,int*y)
{
  int t;
  t=*x;
  *x=*y;
  *y=t;

 
}