CODEWITHSUNDEEP
c++while-loopcharacterifstream
Jarvis
Jarvis

Reputation: 53

ifstream to get then next character

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

Upvotes: 0

Views: 2581

Answers (1)

David G
David G

Reputation: 96845

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

Upvotes: 3

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