How compare char str[MAXCHAR] with a string? - c++

Question

I want compare if both sequence are equals and i'm using the following code but comparation always return false.
=========================================================================
// testecompare.cpp : Defines the entry point for the console application.
//
#include "stdafx.h"
#include <string>
#include <iostream>
#include <fstream>
#include <Windows.h>
using namespace std;
string getCurrentDirectoryOnWindows()
{
const unsigned long maxDir = 260;
char currentDir[maxDir];
GetCurrentDirectory(maxDir, currentDir);
strcat(currentDir, "\\l0gs.txt");
return string(currentDir);
}
string ReadFileContent() {
string STRING;
string aux;
ifstream infile;
infile.open(getCurrentDirectoryOnWindows());
while (!infile.eof())
{
getline(infile, STRING);
return STRING;
}
infile.close();
return "";
}
int _tmain(int argc, _TCHAR* argv[])
{
char str[MAXCHAR] = "";
sprintf(str, "0x0%X", "1D203E5");
cout << str << endl;
cout << "File content: " << ReadFileContent() << endl;
// if i have the string "0x01D203E5" in my txt file
if (_stricmp(str,ReadFileContent().c_str()) == 0) {
cout << "Contents are equals!\n";
}
system("pause");
return 0;
}
How make this comparation correctly?
Thank you very much.

Answer 1

An easy trick for comparing instances of different types is to convert them to a common type then compare.
So for example:
std::string content(ReadFileContent());
std::string from_array(str)
if (from_array == content)
{
}
Edit 1: Working example
The code works.
Here is a working program:
#include <iostream>
#include <string>
int main()
{
static const char text[] = "Hello";
std::string text_as_string(text);
std::string expected_str("Hello");
if (text_as_string == expected_str)
{
std::cout << "Strings are equal: " << text_as_string << "\n";
}
else
{
std::cout << "Strings are not equal.\n";
}
return 0;
}
$ g++ -o main.exe main.cpp
$ ./main.exe
Strings are equal: Hello
Remember, the above code samples are compare entire or whole strings, not substrings. If you want to search for a key string within a larger string, that requires different functions.