Intro to Dynamic memory

code.cpp

#include <iostream>

// Dynamic mem: Memory that is allocated after the
//              program is already compiled and running.
//              Use the "new" operator to allocate memory
//              in the heap rather than the stack

/*              Useful when we dont know how much memory we will need.
                Makes our programs more flexible, specially when 
                accepting user input. */
                
int main () {

    char *pGrades = NULL;
    int size;

    std::cout << "How many grades to enter in?: ";
    std::cin >> size;

    pGrades = new char[size];

    for(int i = 0; i < size; i++){
        std::cout << "Enter grade #" << i + 1 << ": ";
        std::cin >> pGrades[i];
    }

    for(int i = 0; i < size; i++){
        std::cout << pGrades[i] << " ";
    }

    delete[] pGrades;

    return 0;
}