3) Write a C program to find sum of two complex numbers by using structure. Complex numbers will be entered by user. Use “typedef" and “struct" to define structures for complex numbers in this program. Sample output of the program shown below. Notice that answers without using structures will not be taken into account. r. Enter real and inaginary parts respectively for the 1st conplex nunber: 1 2 Enter real and inaginary parts respectively for the 2nd conplex nunber: 3 4 Sun-4.8+6.@i Process exited vith return value 0 Press any key to continue .

def optimize_tail_calls(original_scheme_eval): """Return a properly tail recursive version of an eval function.""" def optimized_eval(expr, env, tail=False): """Evaluate Scheme expression EXPR in Frame ENV. If TAIL, return an Unevaluated containing an expression for further evaluation. """ if tail and not scheme_symbolp(expr) and not self_evaluating(expr): return Unevaluated(expr, env) result = Unevaluated(expr, env) # fill in code code here while isinstance(result, Unevaluated): #code here return optimized_eval scheme_eval = optimize_tail_calls(scheme_eval)

Define a structure type to represent a common fraction. Write a program that gets a fraction and displays both the fraction and the fraction reduced (by using greatest common divisor (GCD) function) to lowest terms using the following code fragment:  The fraction is supposed to have a numerator and denominator.Code fragment: //starts here frac = get_fraction(); print_fraction(frac); printf(" = "); print_fraction(reduce_fraction(frac)); // ends here

Please answer in C++ Define a structure called Date with month, day and year as its only data members, Time with hour and minute as its only members and Event with desc (a c-string for description of maximum size 80), date (of type Date) and time (of type Time). Write a readEvents() function that will keep asking the user if he or she wants to add a new event. As long as the user answers with a 'y' or 'Y', allocate memory dynamically for an Event structure, storing the pointer returned by new in the array of Event pointers and then read the Event data from the keyboard and store them in the Event just created. Dates should be entered like 5/21/20 and times as 10:15. When finished entering the Events, the function will return the number of Events entered. Write a sort-desc() function to sort the Events by their description by rearranging the pointers (rather than the structures), by passing it the array of pointers and the number of Events created.  Use a swapPtrs() function to swap…