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C library function - isgraph()
Description
The C library function int isgraph(int c) checks if the character has graphical representation.
The characters with graphical representations are all those characters that can be printed except for whitespace characters (like ' '), which is not considered as isgraph characters.
Declaration
Following is the declaration for isgraph() function.
int isgraph(int c);
Parameters
c − This is the character to be checked.
Return Value
This function returns non-zero value if c has a graphical representation as character, else it returns 0.
Example
The following example shows the usage of isgraph() function.
#include <stdio.h> #include <ctype.h> int main () { int var1 = '3'; int var2 = 'm'; int var3 = ' '; if( isgraph(var1) ) { printf("var1 = |%c| can be printed\n", var1 ); } else { printf("var1 = |%c| can't be printed\n", var1 ); } if( isgraph(var2) ) { printf("var2 = |%c| can be printed\n", var2 ); } else { printf("var2 = |%c| can't be printed\n", var2 ); } if( isgraph(var3) ) { printf("var3 = |%c| can be printed\n", var3 ); } else { printf("var3 = |%c| can't be printed\n", var3 ); } return(0); }
Let us compile and run the above program to produce the following result −
var1 = |3| can be printed var2 = |m| can be printed var3 = | | can't be printed
ctype_h.htm
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