Attempting to store user input into array

Question

How do I read user input line by line and store that user input into an array?

In other words, storing "Apples raw, 110, 50.6, 1.2, 1.0" into a char array and that whole line is index 0. Then index 1 will be "Bananas,225, etc"

Here is the user input:

Apples raw, 110, 50.6, 1.2, 1.0

Bananas, 225, 186, 6.2, 8.2

Bread pita whole wheat, 64, 134, 14, 22.6

Broccoli raw, 91, 21.9, 2.8, 6.3

Carrots raw, 128, 46.6, 2.6, 3.3

Can you use std::vector instead of new[]? It's usually a far better plan. — tadman
– tadman, Commented Dec 11, 2020 at 2:53
Can you show how you implemented istream& operator>>(istream& stream, NutritionData & data) Microsoft has an example here: https://learn.microsoft.com/en-us/cpp/standard-library/overloading-the-input-operator-for-your-own-classes?view=msvc-160 — drescherjm
– drescherjm, Commented Dec 11, 2020 at 2:53
Why did you remove even the snippet of source code you had originally? Please, edit your question and insert a minimal reproducible example. — Scheff's Cat
– Scheff's Cat, Commented Dec 11, 2020 at 6:51

tresz · Accepted Answer · 2020-12-11 23:08:47Z

For writing user input line by line you could use a getline() function. It reads a line untill it encounters a delimiter which is by default a newline character "\n".

Example:

#include <iostream> int main() { std::string yourArray[5]; for(int i=0; i<5;i++) { getline(std::cin, yourArray[i]); } std::cout << std::endl; for(int i=0; i<5; i++) { std::cout << yourArray[i] << std::endl; } }

input:

Apples raw, 110, 50.6, 1.2, 1.0
Bananas, 225, 186, 6.2, 8.2
Bread pita whole wheat, 64, 134, 14, 22.6
Broccoli raw, 91, 21.9, 2.8, 6.3
Carrots raw, 128, 46.6, 2.6, 3.3

output:

Apples raw, 110, 50.6, 1.2, 1.0
Bananas, 225, 186, 6.2, 8.2
Bread pita whole wheat, 64, 134, 14, 22.6
Broccoli raw, 91, 21.9, 2.8, 6.3
Carrots raw, 128, 46.6, 2.6, 3.3

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