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C isprint() function

C isprint(int ch)

The isprint() function is used to check whether a character is a printable character or not. The function is defined in the ctype.h header file.

Syntax:

int isprint( int arg );

isprint() Parameters:

Name Description Required /Optional
ch ch is a character of class upper in the current locale. Required

Return value from isprint()

  • The isprint() function returns non-zero if ch is a printable character; otherwise returns 0.

Example: C isprint() function

#include <stdio.h>
#include <ctype.h>
int main()
{
    char ch;
    ch = 'y';
    printf("\nIf %c is printable character or not? %d", ch, isprint(ch));
    ch = '\t';
    printf("\nIf %c is printable character or not? %d", ch, isprint(ch));
    ch = 'A';
    printf("\nIf %c is printable character or not? %d", ch, isprint(ch));
}

Output:

If y is printable character or not? 2
If       is printable character or not? 0
If A is printable character or not? 1

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C Programming: Tips of the Day

What's an object file in C?

An object file is the real output from the compilation phase. It's mostly machine code, but has info that allows a linker to see what symbols are in it as well as symbols it requires in order to work. (For reference, "symbols" are basically names of global objects, functions, etc.)

A linker takes all these object files and combines them to form one executable (assuming that it can, i.e.: that there aren't any duplicate or undefined symbols). A lot of compilers will do this for you (read: they run the linker on their own) if you don't tell them to "just compile" using command-line options. (-c is a common "just compile; don't link" option.)

Ref : https://bit.ly/3CbzF8M