Question

In C: write the function definition for a function called COMPOSITENUM that takes one double argument called num. The function will declare, ask and get another double from the user. Compare the double entered by the user to NUMband return to a 0 if they are the same, a -1 if num is less than the double entered by the user and 1 if it is greater.

Answer 1

#include <stdio.h>

int COMPOSITENUM(double num)
{
   double n; // declare
   printf("Enter the value of n : "); // ask
   scanf("%lf",&n); // get n from user
  
   if(n == num)
   return 0;
   else if(num < n)
   return -1;
   else
   return 1;
}
int main(void) {
  
   if(COMPOSITENUM(56.7) == 0)
   printf("\nBoth numbers are same");
   else if(COMPOSITENUM(56.7) == -1)
   printf("\nnum is less than n");
   else if(COMPOSITENUM(56.7) == 1)
   printf("\nnum is greater than n");
  
   return 0;
}

Output:

Enter the value of n : 56.7
Both numbers are same

Do ask if any doubt.