Flush the buffer : fflush « stdio.h « C Tutorial

1. C Tutorial
2. stdio.h
3. fflush

#include <stdio.h>
 
int main()
{
    char a,b;
 
    printf("Which character is greater?\n");
    printf("Type a single character:");
    a=getchar();
    fflush(stdin);
    printf("Type another character:");
    b=getchar();
    fflush(stdin);
 
    if(a > b)
    {
        printf("'%c' is greater than '%c'!\n",a,b);
    }
    else if (b > a)
    {
        printf("'%c' is greater than '%c'!\n",b,a);
    }
    else
    {
        printf("Next time, don't type the same character twice.");
    }
    return(0);
}

Which character is greater?
      Type a single character:2
      Type another character:'2' is greater than '
      '!