C++ How to replace unusual quotes in code - c++

Question

sometimes when you copy code from a document it gets line numbers and strange quotes. I've written a script to remove those initial numbers but it is very hard to find a way to remove those strange quotes ‘’“” so I've included my full code. It reads in a file and puts out a formatted file. But the compiler warns that these quotes are multi characters, which I guess means non standard ascii chars. It kinda works but it's not a great solution. Any help appreciated:
#include <iostream>
#include <fstream>
#include <string>
using namespace std;
string replaceChar(string str, char ch1, char ch2);
// Main
int main(int argc, char *argv[]) {
string line;
fstream stri, stro;
// ifstream in
stri.open(argv[1], ios::in);
if(stri.fail()){
cerr << "File failed to open for input" << endl;
return 1;
}
// ofstream out
stro.open("file_out.txt", ios::out);
if(stro.fail()){
cerr << "File failed to open for output" << endl;
return 1;
}
// Read - Write
//stri.get(c);
getline(stri, line, '\n');
while(!stri.eof()){
// Remove numbers
line.erase(0,3);
//line.replace( line.begin(), line.end(), "‘", "\'" );
//line.replace( line.begin(), line.end(), "’", "\'" );
//line.replace( line.begin(), line.end(), "“", "\'" );
//line.replace( line.begin(), line.end(), "”", "\'" );
line = replaceChar(line, '‘','\'');
line = replaceChar(line, '’','\'');
line = replaceChar(line, '“','\"');
line = replaceChar(line, '”','\"');
stro << line << endl;
getline(stri, line, '\n');
}
// Close files
stri.close();
stro.close();
// Output
cout << "File Edited Ok!";
//cout << count -1 << " characters copied."<< endl;
}
string replaceChar(string str, char ch1, char ch2) {
for (int i = 0; i < str.length(); ++i) {
if (str[i] == ch1)
str[i] = ch2;
}
return str;
}

Answer 1

Ok, it ain't pretty, but it works. Anyone want to refine searching for one of those damned strange quote marks be my guest!
#include <iostream>
#include <fstream>
#include <string>
using namespace std;
// Function Declaration
bool replace(string& str, const string& from, const string& to);
bool checkMyLine(string line);
// Main
int main(int argc, char *argv[]) {
// line to edit
string line;
fstream stri, stro;
// ifstream in
stri.open(argv[1], ios::in);
if(stri.fail()){
cerr << "File failed to open for input" << endl;
return 1;
}
// ofstream out
stro.open("file_out.txt", ios::out);
if(stro.fail()){
cerr << "File failed to open for output" << endl;
return 1;
}
// Read - Write
while(getline(stri, line, '\n')){
// Remove numbers at start of each line followed by space, eg: "001: "
int i;
for(i = 0;i < line.length();i++)
{
if(line[i] == ' ') break;
}
line.erase(0,i+1);
//Replace Odd Chars
for(int i=0;i<line.length();i++)
{
replace(line, "\u2018","\u0027"); // replaces ‘
replace(line, "\u2019","\u0027"); // replaces ’
replace(line, "\u201C","\u0022"); // replaces “
replace(line, "\u201D","\u0022"); // replaces ”
}
// Write to file
stro << line << endl;
}
// Close files
stri.close();
stro.close();
// Output Message
cout << "File Edited Ok!";
}// End of Main
//
bool replace(string& str, const string& from, const string& to)
{
size_t start_pos = str.find(from);
if(start_pos == string::npos)
return false;
str.replace(start_pos, from.length(), to);
return true;
}

Answer 2

What kind of script did you write to remove the leading numbers?
Do you have access to sed or tr? They exist for just this kind of problem.
sed -e 's/[‘’“”]//g'
No need to re-invent the wheel