C / C++ / MFC

Nader Elshehabi wrote:

char* MyText = new char;
cin>>MyText;
delete[] MyText;

void main()
{
	char* MyText = new char;
	cin>>MyText;
	delete MyText;
}

void main()
{
	char* MyText = new char[100];
	cin>>MyText;
	delete [] MyText;
}

Nader Elshehabi wrote:

Well, the first coder didn't work, while the second did.

Nader Elshehabi wrote:

Yet, that makes a buffer of N chars. That's not what I want. What if the user inputs n+1 chars.

char ch;
string input;
while ((ch = cin.getc()) != '\n')
{
   input += ch;
}

char* MyText = new char[5];
cin>>MyText;
MyText = new char[10];
delete[] MyText;

Regards

Nader Elshehabi wrote:

Is there a leak here??

Nader Elshehabi wrote:

Will the memory be freed?

Nader Elshehabi wrote:

Now , I called a second new without deleting the first one. Is there a leak here??

Nader Elshehabi wrote:

What if I didn't call a delete at all!! Once my program finishes and closes. Will the memory be freed?
Or will it be permanently locked until reboot?

Zac Howland wrote:

Are you coming from a Java/C# background by chance?

Extra Regards

getline(cin, input);

char buffer[100] = {0};
cin.getline(buffer, 99);

string line;
getline(cin, line);

#include <iostream>
#include <iomanip>
 
int main(int argc, char *argv[])
{
    using namespace std;
 
    char *pChar = new char[2];
    cin >> setw(2) >> pChar;
    delete [] pChar;
 
    return 0;
}

cin >> *MyText;

Chris Losinger wrote:

probably won't fix the crash, but main should be declared as:

int main(int argc, char *argv[])

or

int main(int argc, char **argv)