SAS/C Library Reference, Vol. 1

fputc -- Write a Character to a File

SYNOPSIS

 #include <stdio.h>

 int fputc(int c, FILE *f);

DESCRIPTION

fputc writes a single character c to the stream associated with the FILE object addressed by f.

RETURN VALUE

fputc returns the character written or EOF if an error occurs.

IMPLEMENTATION

fputc is implemented as an actual function call, not a built-in function, so it is slower than putc. (However, less code is generated.)

EXAMPLE

  #include <stdio.h>
  #include <string.h>
  #include <stdlib.h>

  main()
  {
     int c;               /* must be int not char  */
     char filename[60];
     FILE *infile, *outfile;

     puts("Enter the name of your input file:");
     memcpy(filename, "tso:", 4);
     gets(filename+4);
     infile = fopen(filename, "r");
     if (!infile){
        puts("Failed to open input file.");
        exit(EXIT_FAILURE);
     }
     puts("Enter the name of your output file:");
     memcpy(filename, "tso:", 4);
     gets(filename+4);
     outfile = fopen(filename, "w");
     if (!outfile){
        puts("Failed to open output file.");
        exit(EXIT_FAILURE);
     }

        /* Read characters from file MYFILE.       */
     while ((c = fgetc(infile)) != EOF)

           /* Write characters to YOURFILE.        */
        if (fputc(c, outfile) == EOF) break;
     fclose(infile);
  }

RELATED FUNCTIONS

putc, putchar