define this function for cutting every following '\n'

#include <stdio.h> 
void drain_stdin () { 
  int c; 
  do { 
    c = fgetc(stdin); 
  } while (c != EOF && c != '\n'); 
}

example use with scanf() for a char. now the while-loop isn't executed twice while ENTERing a character.

int main() { 
  char x = 1; 
  while (x != '0') { 
    printf( "Enter a char or '0' to exit: " ); 
    scanf( "%c", &x ); 
    drain_stdin(); 
    printf( "The input was: %c\n\n\n", x); 
 } 
 return 0; 
}

same problem sollution as above, but now with a string. this one avoids the dangerous gets() function and cut away the input-following '\n' read-in by fgets()

size_t len; 
char buffer[1024]; 
fgets(buffer, sizeof(buffer), stdin); 
len = strlen(buffer); 
if(buffer[len - 1] == '\n') buffer[len - 1] = 0;

Both sollutions are provided here:

• http://www.c-plusplus.de/forum/viewtopic-var-p-is-1544556.html#1544556