c program for call by value

C program to swap two numbers using call by value technique.

code:

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

void main()
{
&nbsp; int a= 30, b=20;
&nbsp; swap(a,b);
&nbsp; printf("a=%d b=%d", a, b);
&nbsp; getch();
}

int swap(int x, int y)
{
&nbsp; int t;
&nbsp; t = x;
&nbsp; x = y;
&nbsp; y = t;
&nbsp; printf("x=%d y=%d", x, y);
}

output:

x=20 y=30
a=30 b=20

after swapping the value will be changed on X & Y. See the value of A & B is not changed.

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