Write a program in C++ to read 20 integers into a 1D array using a method > called readdata () of a class named calclass, then add all the positive numbers and place them in a variable sumPositive using a method named sumpos () and add all negative numbers and place them in a I variable sumNegative using a method named negpos (). At the end, the program should display the values in both variables sumPositive and sumNegative. Note: don't forget to initialize your variables sumPositive and sumNegative to 0 inside the methods that are performing the sum on them.