Practical - 7
Aim: Write a program to swap the value of two variables without using third variable.
Program:
#include <stdio.h>
#include <conio.h>
void main()
{
clrscr();
int a, b;
printf("Enter the value of 'A' = ");
scanf("%d", &a);
printf("Enter the value of 'B' = ");
scanf("%d", &b);
a = a + b;
b = a - b;
a = a - b;
printf("\nA = %d", a);
printf("\nB = %d", b);
getch();
}
Output:
Enter
the value of 'A' = 4
Enter
the value of 'B' = 5
A
= 5
B
= 4
Algorithm:
Step-1:
START
Step-2:
Declare a and b.
Step-3:
Enter the value of a and b.
Step-4:
a = a + b.
Step-5:
b = a – b.
Step-6:
a = a – b.
Step-7:
Display a and b.
Step-8:
STOP.
Flowchart:
