Swapping integers,float values using macros

#include<stdio.h>

#define SWAP(num1,num2,temp) (temp=num1,num1=num2,num2=temp)

main()
{
   
   int tempi,a=10,b=20;
   float tempf,c=10.7,d=20.2;
   
   SWAP(a,b,tempi);
   
   printf(" a is %d b is %d",a,b);
   
   SWAP(c,d,tempf);
   
   printf(" c is %.2f d is %.2f ",c,d);
   // .2 implies displaying two digits after decimal
}