81. WRITE A C PROGRAM PASSING ARGUMENT TO FUNCTION : CALL BY REFERENCE(ADRESS)

/* C program Passing Argument to Function : call by reference(adress)*/

#include<stdio.h>
void interchange(int *num1,int *num2)
{
int temp;
temp = *num1;
*num1 = *num2;
*num2 = temp;
}
int main() {
int num1=50,num2=70;
interchange(&num1,&num2);
printf("\nNumber 1 : %d",num1);
printf("\nNumber 2 : %d",num2);
return(0);
}

output

Number 1 : 70
Number 2 : 50