I am getting a segmentation fault on this piece of code: void file_parser::check

Question

I am getting a segmentation fault on this piece of code:

void file_parser::check_quote(vector<string> tokens)

{

bool has_quote;

vector<string> v1;

string tmpstr;

int FirstQuote;

int SecondQuote;

string tmp;

string tmpstr2;

for (int i = 0; i <= tokens.size(); i++) {

tmp = tokens[i].c_str();

for (int i = 0; i <= tokens.size(); i++) {

if (tmp[i] == ''') {

has_quote = true;

FirstQuote = i;

}

if (has_quote && i != FirstQuote && tmp[i] == ''') {

SecondQuote = i;

for (int k = FirstQuote; k <= SecondQuote; k++) {

tmpstr += tokens[k];

}

tokens.insert(tokens.begin() + FirstQuote, tmpstr);

for (int j = FirstQuote + 1; j < i; j++) {

for (int l = SecondQuote + 1; l <= tokens.size() - 1; l++) {

tmpstr2 = tokens[SecondQuote + 1];

tokens.insert(tokens.begin() + j, tmpstr2);

}

}

int test = tokens.size() - SecondQuote + 1;

while (test > 0) {

tokens.erase(tokens.end());

}

}

}

}

}

Explanation / Answer

You are running the for loop at each iteration for i=0 to i=tokens.size(). Run it till tokens.size()-1. It is trying to access an element which is not present.

Also all your loops have the same variable 'i' . Nested loops can lead to problems in such a scenario

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