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isprint() Test for Printable Character
#include <ctype.h>
int isprint(c);
int c; Integer value to be tested
isprint() tests if 'c' is a printable character. Printable
characters have an ASCII value between 32 - 126, (0x20 - 0x7e), a
space and the tilde, inclusive.
Returns: True (nonzero) if the integer satisfies the test
condition or false (zero) if it does not. The result is
undefined if 'c' is other than an ASCII character or EOF.
Notes: isprint() is a macro.
-------------------------------- Example ---------------------------------
The following statements read characters from one file and, if
printable, write them out to a second file.
#include <ctype.h>
#include <stdio.h> /* for fopen */
FILE *in, *out;
int ch;
main()
{
if ((in = fopen("good.dat","w+")) != NULL &&
(out = fopen("input.dat", "r+")) != NULL) {
while (!feof(in))
if (isprint(ch = getc(in)))
putc(ch,out);
}
}
See Also:
isalnum()
isalpha()
isascii()
iscntrl()
isgraph()
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Written by Dave Pearson