C program to swap two numbers without temporary variable

C program to swap two numbers without temporary variable

#include<stdio.h>

#include<conio.h>
void main()
{
    float a,b;
    printf("Enter a and b\n");
    scanf("%f%f",&a,&b);
    printf("Before swap,a=%f,b=%f\n",a,b);
    a=a+b,b=a-b,a=a-b;
    printf("After swap, a=%f,b=%f",a,b);
    getch();
}