c++ - 如何将用户输入存储到数组中

Question

I want to build a simple program that can create data, update, and delete it. I'm not using a database so I want to use an array for storing it.

But, I have no clue to do that. So Here my code :

void addDataStudent() {

char name[30];
int age;

std::cout << "Name of student :";
std::cin >> name;
std::cout << "Age of student :"
std::cin >> age;

}

I want to make array something like this, so I can manipulate the data

Student[] = {
    [1][John, 15]
    [2][Doe, 13]
}

Anybody knows how to do that ? or give me a reference so I can start learning this code. Thanks

Answer 1

If you want a very simple struct-based approach, that also introduces the STL, try this:

#include <iostream>
#include <array>
//read about structs; the typedef is here so we can refer to this type simply as 'Data'
typedef struct data{
    std::string name;
    int age;
} Data;
//note the & means pass-by-reference so we reduce copying expenses
void addStudent(Data& store) {
    std::cout << "Enter name: ";
    std::cin >> store.name;
    std::cout << "Enter age: ";
    std::cin >> store.age;
}

int main() {
    const int SIZE = 3;
    std::array<Data, SIZE> Students {};  // STL fixed-size array (see std::vector also)

    for (int i = 0; i < SIZE; ++i) {
        addStudent(Students[i]);         //this (a struct inside the array) gets passed
    }                                    //to the function by reference

    for (auto student : Students) {      //here we display contents of container
        std::cout << student.name << " " << student.age << std::endl;
    }

    return 0;
}

A lot of C++ textbooks won't introduce the STL containers till much later but I think it's better to know about them from the start. Keep it up!