getline function weird errors

I was trying do some file read/write stuff and I am unable to run my second getline command. Any ideas as to why this happens?

char str[80];
char substr[10];
file.open("abc.txt", fstream::in);

    file.getline(str,'\n');
      while(!file.eof())
    {
        i=0;
        while(str[i]!='\n') {substr[i] = str[i++]; }

        substr[i++]='\n'; 
        cout<<substr;

        file.getline(str,'\n');

    }

abc.txt

AND 1 2 3
NAND 4 5 6
NOR 2 3 7
XOR 1 6 8
OR 8 7 9

开发者_JAVA百科I used notepad++ to create the txt file, so am pretty sure there are CR/LF at the end of each line

---

2nd argument of fstream::getline is the streamsize, not delimiter. For delimited version, you need the overloaded version. See this reference.

---

Following up with my comment, try moving the file.getline command within the while loop:

...
while(!file.eof())
{
    file.getline(str,80,'\n');
    ...

---

This works. Use getline() in the while condition and get the string delimeted by '\n' and use strcpy.

char str[80] = { '\0' };   
char substr[80] = { '\0' };

ifstream file;
file.open("abc.txt", fstream::in); 


int i  = 0;
while(file.getline(str, 79, '\n'))   
{   
    strncpy(substr, str, 78);    
    substr[strlen(substr)]='\n';    
    cout<<substr;      
}