Write a c++ program for the following question parts

Write a program that prompt the user to input the value of m, n, x and y and then calculate the following summation using the given mathematical formula. . m n 1-1 j=1 Write a C++ program to print all Armstrong numbers between Lower Limit to Upper Limit. Take Lower Limit and Upper Limit from user. (Do not use built-in power function) What is Armstrong number? An Armstrong number is a n - digit number that is equal to the sum of nth power of its digits. For example, 6 616 371 = 33 + 73 + 13 = 371