c language input single characters are four ways to avoid carriage returns

1. Use '\ n' in scanf () shield the carriage return.

   Scanf ( " % D \ n- " , & n-); // use '\ n' Enter filter 
   Scanf ( " % C " , & C);

   or

   scanf("%d",&x);
   scanf("\n%c",&c);

    

2. In scanf () format string front add a space, a carriage return character mask

   Scanf ( " % D " , & n-); 
   Scanf ( " % c " , & c); // % c front spaces, carriage returns filtered

    

3. Before receiving the characters, using getchar () to read a carriage return symbol

   Scanf ( " % D " , & n-); 
   getchar ();   // dedicated to reading the last symbol entered the transport 
   Scanf ( " % C " , & C);

    

4. Before receiving characters using fflush () Clear the contents of the input stream buffer

   Scanf ( " % D " , & n-) 
   fflush (stdin);   // flush character input stream buffer, attention must be introduced #include <stdlib.h> header 
   Scanf ( " % C " , & C);