Character Classification Functions in C++ Programming

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Character classification in C++ is possible using functions specified in function library. These functions are included in the cctype header file. These can be classification functions like isalpha, isalnum, isdigit, islower, isupper, etc.

The program demonstrates the usage of character classification functions in C++ programming, specifically the isspace() function.

• The isspace() function is a part of the cctype library and is used to check if a given character is whitespace, i.e., space, tab, newline, vertical tab, form feed, or carriage return.
• In the program, an array of characters a is initialized with the values "R@ 1a". A for loop is used to iterate through each character of the array. For each character, the isspace() function is used to check if it is whitespace. If the character is whitespace, it is printed along with the message "Space" using the cout statement.

Source Code

#include <iostream>
#include <cctype>
using namespace std;
int main()
{
    /*
    Character Classification Functions in C++ Programming
      isalnum
      isalpha
      isdigit
      islower
      isupper
      isspace
    */
    char a[6]="R@ 1a";
    for (int i=0; i<=5; i++)
    {
        if(isspace(a[i]))
            cout<<a[i]<<" Space"<<endl;
    }
    return 0;
}
 

Output

  Space

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