function
<cctype>
isgraph
Check if character has graphical representation
Checks whether c is a character with graphical representation.
The characters with graphical representation are all those characters than can be printed (as determined by isprint) except the space character (' ').
For a detailed chart on what the different ctype functions return for each character of the standard ASCII character set, see the reference for the <cctype> header.
In C++, a locale-specific template version of this function (isgraph) exists in header <locale>.
Parameters
- c
- Character to be checked, casted to an int, or EOF.
Return Value
A value different from zero (i.e., true) if indeed c has a graphical representation as character. Zero (i.e., false) otherwise.
Example
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/* isgraph example */
#include <stdio.h>
#include <ctype.h>
int main ()
{
FILE * pFile;
int c;
pFile=fopen ("myfile.txt","r");
if (pFile)
{
do {
c = fgetc (pFile);
if (isgraph(c)) putchar (c);
} while (c != EOF);
fclose (pFile);
}
}
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This example prints out the contents of "myfile.txt" without spaces and special characters, i.e. only prints out the characters that qualify as isgraph.
See also
- isprint
- Check if character is printable (function
)
- isspace
- Check if character is a white-space (function
)
- isalnum
- Check if character is alphanumeric (function
)