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June 24th, 2009, 10:40 PM
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Syntax errors - Question on c++ code project
I am writting a program that has three different files and is compiled by a Makefile. The goal is to take a file of text and split it up in different sections and stored in vectors. Then it outputs the information in a standard format. The main is fine and my function declarations are good also I am just having trouble writing the functions. Below are the function names and what they need to do. I have been trying some different ways to write the code and I keep coming up with errors I am new at c++. I will also attach the code I have so far if any can help point me in the right direction.
Log_Entry create_Log_Entry(const string&); This function does the following: The parameter is a log entry line. Create a Log_Entry object. Break the line into fields and subfields using split(). Several splits will be necessary. Fill the data members with values. Split on ' ' (space character) first, if the split does not give 10 strings set the number of bytes to 0 and return. (Some lines in the file may be bad.) For string to int conversion use string streams. vector<Log_Entry> parse(string); This function does the following: Open a log file specified by the parameter name (File I/O). Read lines from the opened file. Create a Log_Entry object passing the line just input. Push each Log_Entry object onto a vector. Return the vector of Log_Entrys. void output_all(const vector<Log_Entry> &); This function does the following: Loop through the vector provided as the argument and output all information for each Log_entry object. Format the output neatly in some manner, example output. int byte_count(const vector<Log_Entry> &); This function does the following: Loop through the vector provided as the argument and sum the number_of_bytes members. The sum is returned. void output_hosts(vector<Log_Entry>); This function does the following: Loop through the vector provided as the argument and output the host member of each Log_Entry object in the vector one per line. vector<string> split(const string&, char); This function does the following: Takes a character parameter, uses the character as a separator in the string, and returns a vector of strings. Ex. If the split function is given "abc:12345:xx" and ':' it will return a vector of 3 strings: "abc", "12345", and "xx". One approach, a loop goes through the string, if the current character is not the splitter accumulate it into a string using string += char, if the current character is the splitter then push_back the string that holds the accumulated characters and clear the accumulator string variable. There is a test function for split that can be run from the makefile. To run, for example: ./split abcx24567xqqq x ./split "abc 24567 qqq" " " Code:
#include <iostream>
#include <fstream>
#include <string>
#include <vector>
#include <sstream>
#include "log_view.hpp"
#ifdef CS2_STRING
#include "string.hpp"
using cs33001::string;
#else
#include <string>
using std::string;
#endif
using namespace std;
vector<Log_Entry> parse(const string&)
{
string line;
vector<Log_Entry> _line;
ifstream myfile ("name.txt");
if(!myfile)
{
cout << "Couldn't open file";
}
if (myfile.is_open())
{
while (! myfile.eof())
{
getline (myfile,line);
Log_Entry _name(line);
_line.push_back(_name);
}
myfile.close();
}
return _line;
}
vector<string> split(const string& entries, char x)
{
string entry;
vector<string> _entry;
int index;
for(int i = 0, j = 0; i < entries.size(); i++)
{
index = entries.find(x,i);
if (index == entries.size())
{
break;
while (j != index)
{
entry += entries[j];
j++;
}
i = i + j;
_entry.push_back(entry);
}
// if(j != 9)
// _entry[9] = 0;
}
return _entry;
}
int byte_count(const vector<Log_Entry> &_name)
{
int bytes = 0;
for (int i = 0; i < _name.size(); i++)
{
bytes += _name[i].get_number_of_bytes();
}
return bytes;
}
void output_hosts(vector<Log_Entry> _name)
{
for(int i = 0; i < _name.size(); i++)
{
string a = _name[i].get_host();
cout << "hostd: " << a[0] << endl;
}
}
Log_Entry::create_Log_Entry(const string&)
{
vector<string> entries = split(entry, ' ');
_host = entries[0];
vector<string> dates = split(entries[3], '/');
_date.day = dates[0];
_date.month = dates[1];
vector<string> times = split(dates[2], ':');
istringstream my(times[0].c_str());
int time = 0;
my >> time;
_date.year = time;
istringstream my2(times[1].c_str());
my2 >> time;
_time.hour = time;
istringstream my3(times[2].c_str());
my3 >> time;
_time.minute = time;
istringstream my4(times[3].c_str());
my4 >> time;
_time.second = time;
_request = entries[5];
_status = entries[8];
istringstream my5(entries[9].c_str());
my5 >> time;
_number_of_bytes = time;
}
void output_all(const vector<Log_Entry> &entries)
{
for(int i = 0; i < entries.size(); i++)
{
cout << "***********************************************" << endl;
cout << "Date Day:" << entries[i].get_date().day << endl;
cout << "Month :" << entries[i].get_date().month << endl;
cout << "Year :" << entries[i].get_date().year << endl;
cout << "Host :" << entries[i].get_host() << endl;
cout << "------------------------------------------------" << endl;
cout << "Time Hours:" << entries[i].get_time().hour << endl;
cout << "Time Min :" << entries[i].get_time().minute << endl;
cout << "Time Sec :" << entries[i].get_time().second << endl;
cout << "Request :" << entries[i].get_request() << endl;
cout << "Status :" << entries[i].get_status() << endl;
cout << "Bytes :" << entries[i].get_number_of_bytes() << endl;
cout << "***********************************************" << endl;
}
return;
}
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