Thread: Segmentation Fault (core dumped)

I'm working on a decoding program, and I'm having trouble with a string which I want to give a variable size, which causes me "Segmentation Fault (core dumped)" if I give it a constant size and then "str.resize" it, debugger tells me:
error: request for member ‘resize’ in ‘line’, which is of non-class type. The problem is with line 74.

Code:

#include <iostream>
#include <string>
#include <fstream>

using namespace std;

string code = "the quick brown fox jumps over the lazy dog";
int x = code.length();

int checkCode(string a[], int size) {
    int numcode = 8;
    int numspace = 0;
    int numret = 0;
    for (int i = 0; i < size; i++) {
        string b = a[i];
        int c = b.length();
        if (c == x) {
            for (int j = 0; j < c; j++) {
                if (b[j] == ' ') numspace++;
            }
            if (numspace == numcode) {
                numret = i;
                i = size;
            }
        }
    }
    return numret;
}

string getCode(string d) {
    string dec = "abcdefghijklmnopqrstuvwxyz";
    char loc = ' ';
    int q = d.length();
    for (int i = 0; i < q; i++) {
        if (d[i] != ' ') {
            loc = d[i] - 'a';
            dec[loc] = code[i];
        }
    }
    return dec;
}

void decode(string s[], int size, string d, string name) {
    char loc = ' ';
    ofstream arch;
    arch.open(name.c_str());
    for (int i = 0; i < size; i++) {
        string n = s[i];
        int t = n.length();
        for (int j = 0; j < t; j++) {
            if (n[j] != ' ') {
                loc = n[j] - 'a';
                n[j] = d[loc];
            }
        }
        arch << n << endl;
    }
}

int main() {
    int num = 0,codeN,cont;
    string dec, name;

    cout << "Coded file name: ";
    cin >> name;

    //Open file and creates an array based on size
    ifstream arch;
    arch.open((name).c_str());
    while (getline(arch,dec)) {
        num++;
    }
    string line[30];
    line.resize(num);

    arch.clear();
    arch.seekg(0);
    cont = 0;
    while (!arch.eof()) {
        getline(arch,line[cont]);
        cont++;
    }
    arch.close();

    cout << "Decoded file name: ";
    cin >> name;

    codeN = checkCode(line,num);
    dec = getCode(line[codeN]);
    decode(line,num,dec,name);

    cout << "File ready: " << name << endl;

    return 0;
}

The problem is with line 74.

O_o

No. The problem is with you.

An array of thing is not an instance of thing; it is an array of thing.

Consider using a `std::vector<std::string>'; I don't see you doing this right without it.

Soma

Thank you for all the commentary. As a beginner it's helpful to get feedback on conventions to make my code better. I'm bumping myself in the head for trying to use an array in that way.