fgetc

returns the next character from a file; generates a true function call

fgets

reads a line from a file; the line is terminated by a NUL character

fputc

writes a single character to a file; generates a true function call

fputs

writes a string to a file

getc

returns the next character from a file; implemented as a macro

getchar

returns the next character from standard input

gets

reads a line from standard input; replacing the newline with a NUL character

putc

writes a single character to a file; implemented as a macro

putchar

writes a single character to standard output

puts

writes a string to standard output; terminates the string with a newline

ungetc

writes a character to a file buffer leaving the file positioned before the character