Home - News ( United States | United Kingdom | Italy | Germany ) - Football scores

Showing content from https://www.tutorialspoint.com/cpp_standard_library/cpp_basic_ios_ignore.htm below:

C++ istream::ignore() function

The C++ std::istream::ignore() function is used to skip or ignore characters in an input stream. It is useful for clearing out unwanted characters or handling input that contains extra characters after reading the expected data.

If the number of characters or the delimiter is specified, it will skip that many characters or until the delimiter is encountered.

Following is the syntax for std::istream::ignore() function.

istream& ignore (streamsize n = 1, int delim = EOF);

• n − It indicates the maximum number of characters to extract.
• delim − It indicates the delimiting character.

This function returns the basic_istream object (*this).

If an exception is thrown, the object is in a valid state.

Modifies the stream object.

Let's look at the following example, where we are going to skip the fixed number of characters.

#include <iostream>
#include <sstream>
int main()
{
    std::istringstream x("ABTutorialsPoint.");
    x.ignore(2);
    std::string y;
    std::getline(x, y);
    std::cout << "Result :  " << y << std::endl;
    return 0;
}

Output of the above code is as follows −

Result :  TutorialsPoint.

Consider the following example, where we are going to use the ignore() function to skip the space between the numbers.

#include <iostream>
#include <sstream>
int main()
{
    std::istringstream x("11 12 23");
    int a, b, c;
    x >> a;
    x.ignore();
    x >> b;
    x.ignore();
    x >> c;
    std::cout << "Result : " << a << ", " << b << ", " << c << std::endl;
    return 0;
}

Following is the output of the above code −

Result : 11, 12, 23

In the following example, we are going to skip the character until the delimiter is found.

#include <iostream>
#include <sstream>
int main()
{
    std::istringstream x("11,23,34");
    x.ignore(11, ',');
    std::string a;
    std::getline(x, a, ',');
    std::cout << "Result : " << a << std::endl;
    return 0;
}

If we run the above code it will generate the following output −

Result : 23

istream.htm

RetroSearch is an open source project built by @garambo | Open a GitHub Issue

Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo

HTML: 3.2 | Encoding: UTF-8 | Version: 0.7.4