removing array[x]?

[qwertyking]

Hi I'm working on dropping array.
for example, there are these three arrays
[0]mary 2 90
[1]john 1 85
[2]james 3 70
if I cin >> row, for example 0, it should print out
[0]john 1 85
[1]james 3 70
I could remove [0] in my code, moved the array elements, but cannot remove array[2]. can you guys tell me how to do it?

#include<iostream>
#include<string>
using namespace std;
int main() {
    string command;
    string name[20];
    int section[20];
    int grade[20];
    int low = 0;
    int high = 0;
    int itemp=0;
    int row;
    int max;
    int i=0;
    
    cout << "Enter a command (add, print, drop, sort, average, quit):\n";
    cin >> command;
    while (command != "quit") {
        if (command == "add") {
            cout << "Enter name section grade:\n";
            cin >> name[i];
            cin >> section[i];
            cin >> grade[i];
            i++;
            }
        else if (command == "print") {
            int j;
            if (i>0) {
            itemp = i-1;
                for (j = 0; j <= itemp; j++) {
                    cout << "[" << j << "]: " << name[j] << " " << section[j] << " " << grade[j] << "\n";
                }
            }
        }
        else if (command == "drop") {
            cin >> row;
            int j;
            if (itemp == row) {
                name[row];
            }
            for (j = row; j <= itemp; j++) {
                name[j] = name[j+1];
                section[j] = section[j+1];
                grade[j] = grade[j+1];
            }
                
        }

return 0;
}

[BHX]

Arrays are a set size and I don't think there is a way to change it once created (tells you how often I use them). You need to look into vectors as you can move elements around like an array and then remove the last element in the array.

http://www.cplusplus.com/reference/vector/vector/?kw=vector

You can add to the end of the list with push_back() or delete the last element with pop_back().


Poorly done fast example:

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29

#include <iostream> #include <vector> int main() { std::vector<int> vecList; vecList.push_back(20); vecList.push_back(30); vecList.push_back(40); for (unsigned int i = 0; i < vecList.size(); i++) { std::cout << vecList[i] << " "; } std::cout << std::endl; int temp = vecList[1]; vecList[0] = temp; vecList[1] = vecList[2]; vecList.pop_back(); for (unsigned int i = 0; i < vecList.size(); i++) { std::cout << vecList[i] << " "; } std::cout << std::endl; return 0; }

20 30 40 30 40