Use C++ to calculate area using shoelace formula.

To calculate area you need to change the variable number_of_polygon to the number of polygon your shape has. And change the coordinates array to the coordinate of each vertices of your shape. You need to list it in counter-clockwise position, and don't forget to add the first vertex to the back of the array to create a loop.

Earth is escaping from obstacles to meet his star. Programming in Scratch 3..

Use program to calculate area under curve with trapezoidal rule.

Here is the data.

First it read the data from the CSV file. Then it put the data into arrays. After that the program calculate trapezoidal area using for-loop. Finally, it output the result. NOTE: You must convert the excel file to csv file and remove the header and store it in the same directory in order to make the program work.

This program creates a CSV file containing numbers of subintervals(n), left Riemann sum(L_n), right Riemann sum(R_n), and midpoint Riemann sum. Using for-loop to do the summation.