read .csv file and store into arrays using only <iostream> c++ - c++

Question

Hello I am wondering what the most efficient way would be to read a .csv file and store each comma separated item into its own array or variable. I can only use #include <iostream>. I was thinking about maybe using .getLine(), but all i would know is the delimeter and value to store since there is no <fstream> allowed. That being said does anyone know how I could go about this? Thanks in advance!
This is the layout of the file. The first line indicates the umber of rows to be read.
input file
3
2014,Computer Science,Utah,1568,44.9
2014,Marketing,Michigan,23745,983
215,Business Management, Idaho,256,674
code:
int year;
char* major = new char[40];//cant be longer than 40 characters
char* state = new char[40];
int enrolled;
int rate;
char p;//for cin.get characters possibly
cin>>rows
for(int i = 0; i <= rows; i++){
HMMMMM?
}

Answer 1

You can use cin.getline() function which also accepts a delimiter. As for storing the entire csv record, you can define a structure which stores all the fields.
#include <iostream>
#include <cstring>
using namespace std;
typedef struct temp_struct {
char major[40];
char state[40];
float rate;
int year;
int enrolled;
} RECORD;
int main() {
int rows;
cin >> rows;
RECORD r[rows];
char temp[100];
for(int i = 0; i < rows; i++) {
cin.getline(temp, 100, ',');
r[i].year = atoi(temp);
cin.getline(temp, 100, ',');
strcpy(r[i].major, temp);
cin.getline(temp, 100, ',');
strcpy(r[i].state,temp);
cin.getline(temp, 100, ',');
r[i].enrolled = atoi(temp);
cin.getline(temp, 100);
r[i].rate = atof(temp);
cout << r[i].year << " " << r[i].major << " " << r[i].state << " ";
cout << r[i].enrolled << " " << r[i].rate << endl;
}
return 0;
}
For delimiters, the first four delimiters would be , and since the last value rate has no , following it rather there's a \n, no delimiter is specified in the cin.getline() (since default delimiter is \n itself).
I have tested it; here's the link https://ideone.com/ycht1b