Error: Erasing element from a Vector

[gretty]

Hello

I have a function that writes some text to a text file.

My Problem is: At one point I try to erase an element from a vector ,but I get an error & I dont know why, it looks sytaxically (is that a word? :)) correct & I am including the correct libraries (vector, string etc)

function:

// pic_links is a private vector of the class generate_post
void generate_post::delete_used_pics(char* file) {

	int match=0;
	ofstream outfile;

	outfile.open(file);

	if (!outfile) {
		cout << "Failed to open file";
	}
	for (int i=0; i<(int)pic_links.size(); i++) {
		for (int j=0; j<6; j++) {
			if (pic_links.at(i) == post[j]) {
				match++;
		pic_links.erase(pic_links.at(i)); // the error occurs here
			}
		}
		if (match==0) {
			outfile << "http://inspic.com" << pic_links.at(i) << "\n";
		}
		match=0;
	}

	outfile.close();
}

error:

no matching function for call to `std::vector<std::string, std::allocator<std::string> >::erase(std::basic_string<char,
std::char_traits<char>, std::allocator<char> >&)'

[kvprajapati]

Use,

pic_links.erase(pic_links.begin()+i);

[jencas]

... and perform the outer loop in reverse direction to avoid problems with overlooking the next element after erasing or index going out of bounds when erasing the last element