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

C++ Locale Library - isgraph

It checks if character has graphical representation and the characters with graphical representation are all those characters than can be printed (as determined by isprint) except the space character (' ').

Following is the declaration for std::isgraph.

int isgraph ( int c );

int isgraph ( int c );

c − Character to be checked, casted to an int, or EOF.

It returns a value different from zero.

No-throw guarantee − this function never throws exceptions.

In below example for std::isgraph.

#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);
   }
}

locale.htm

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