How can I read the data from text file and load it into the vector?

Question

I want to read a data from text file using structure and load it into vector.

so I wrote a following to do this but I failed to compile. I don't know what's wrong.

< what I did >

text file contains data as follows;

835,5,0,0,1,1,8.994,0

(integer array[3], integer,integer,integer,integer,integer, float, Boolean)

2.I declared a structure contains following data types to load data into vector;

struct unfinished { int ans[3]; // contains answer int max; int st; int ba; int outs; int tri; float elapsed; bool fin; };

3.I wrote a code to read a data as follows;

#define _CRT_SECURE_NO_WARNINGS #include <iostream> #include <fstream> #include <vector> using namespace std; struct unfinished { int ans[3]; int max; int st; int ba; int outs; int tri; float elapsed; bool fin; }; vector<unfinished> read_rec(istream & is) { vector<unfinished> rec; int ans[3]; int max, st, ba, outs, tri; float elap; bool fini; while (is >> ans[0] >> ans[1] >> ans[2] >> max >> st >> ba >> outs >> tri >> elap >> fini) { rec.emplace_back(ans[0], ans[1], ans[2], max, st, ba, outs, tri, elap, fini); } return rec; } int main(void) { ifstream infile("unfin_rec.txt"); auto unfin = read_rec(infile); vector<unfinished>::const_iterator it; for (it = unfin.begin(); it != unfin.end(); it += 1) { cout << it->ans[0] << it->ans[1] << it->ans[2] << "," << it->max << "," << it->st << "," << it->ba <<","<<it->outs<<","<<it->tri<<","<<it->elapsed<<","<<it->fin<< endl; } system("pause"); return 0; }

I failed to compile this code. error message was: >c:\program files (x86)\microsoft visual studio 12.0\vc\include\xmemory0(600): error C2661: 'unfinished::unfinished' : no overloaded function takes 10 arguments

again, I couldn't figure out what this message means. Please help!

thanks,

seihyung

Add unfinished at the end of struct definition ( } unfinished; ) — Praneeth Peiris
– Praneeth Peiris, Commented Apr 3, 2015 at 14:27
Possible duplicates: stackoverflow c++ read file structure, in other words, search the internet and StackOverflow before posting questions. — Thomas Matthews
– Thomas Matthews, Commented Apr 3, 2015 at 14:42

emvee · Accepted Answer · 2015-04-03 14:43:27Z

You need to add a constructor which takes 10 arguments and fills in the members of the struct, like so:

struct unfinished { unfinished(int a0, int a1, int a2, int m, int s, int b, int o, int t, float e, bool b): max(m), st(s), ba(b), outs(o), tri(t), elap(e), fini(b) { ans[0]=a0, ans[1]=a1, ans[2]=a2; } .... };

haavee, I added a constructor to struct and error message has gone. but nothing poped up on the screen. in other words, I need to check code.... anyway, your advice worked and thanks!

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