ifstream to get then next character

Question

So I have a while look that checks every character in a file.

while (infile.get(ch))

The problem is that in the same loop I have to check the next character to check for some validation.

Is there anyway I could move the next character while keeping track of the current one?

Thanks

Answer 1

Use the peek() method so you will be able to look at the next character before extracting it. Here's an example:

std::istringstream iss("ABC");

for (char c; iss.get(c); )
{
    std::cout << "Current character is: " << c << std::endl;

    if (iss.peek() != EOF)
        std::cout << "Next character is: " << (char)iss.peek();
}

This should output:

 Current character is: A
 Next character is: B
 Current character is: B
 Next character is: C
 Current character is: C