Baliram Sah

//Write a program to swap values of two variables with using third variable.

#include<stdio.h>
int main()
{
int x=10, y=20;
printf("Before swap x=%d x=%d\n",x,y); //x=10 y=20
int temp;// take third variable
temp=x; // assign value of x in temp variable
x=y; // assign value of y in x
y=temp; //assign value of temp in y
printf("After swap x=%d y=%d",x,y);// x=20 y=10
return 0;
}
//Write a program to swap values of two variables without using third variable.
#include<stdio.h>
int main()
{
int x=10, y=20;
printf("Before swap x=%d x=%d\n",x,y); //x=10 y=20
x=x+y;//adding x and y and assign in x =30
y=x-y; // subtract y from x and assign in y =10
x=x-y; //subtract y from x and assign in x =20
printf("After swap x=%d y=%d",x,y); // x=20 y=10
return 0;
}