C putc() function

Last update on September 21 2022 12:12:51 (UTC/GMT +8 hours)

C library function - putc()

The putc() function is used to convert character to unsigned character and then writes character to the output stream at the current position.

Syntax:

int putc(int char, FILE *stream)

Parameters:

Name	Description	Required /Optional
char	Character write to the output stream.	Required
stream	Identifies an address for a file descriptor, which is an area of memory associated with an input or output stream.	Required

Return value

Upon successful completion, putc() shall return the value it has written.
Otherwise, it shall return EOF, the error indicator for the stream shall be set, and errno shall be set to indicate the error.

Example: putc() function

In this example, the contents of a buffer are written to a data stream

#include <stdio.h>
#include <string.h>
 
#define  LEN_STR 80
 
int main(void)
{
   FILE *stream = stdout;
   int i, C;
   char buffer[LEN_STR + 1] = "C Programming.";
 
   for ( i = 0;
        (i < strlen(buffer)) && ((C = putc(buffer[i], stream)) != EOF);
         ++i);
}

Output:

C Programming.

C Programming Code Editor:

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