Member Avatar for JustinsCJ5

It has been a while since i have taken C++ and I am tryig to write a program. The program is supposed to let the user input how many vertices the polygon will have, then let them put in the vertices, calculate the length of the sides, then use Heron's formula to determine the area. I know to start the program i should ask the user how many vertices the polygon will have, then i have to use a loop and arrays to enter the data. However i am not quite sure on how to begin writing this. Can anyone give me help on using loops with arrays?

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  • Latest Post Latest Post by Dave Sinkula
Member Avatar for Dave Sinkula

However i am not quite sure on how to begin writing this. Can anyone give me help on using loops with arrays?

#include <iostream>
 
 int main(void)
 {
    int size;
    std::cout << "size? ";
    std::cin  >> size;
    int *array = new int[size];
    for(int i = 0; i < size; ++i)
    {
 	  std::cout << "array[" << i << "]? ";
 	  std::cin  >> array[i];
    }
    std::cout << "array[" << size << "]: ";
    for(int i = 0; i < size; ++i)
    {
 	  std::cout << array[i] << ' ';
    }
    std::cout << std::endl;
    delete[] array;
    return 0;
 }
 
 /* my output
 size? 4
 array[0]? 1
 array[1]? 2
 array[2]? 3
 array[3]? 5
 array[4]: 1 2 3 5
 */
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