알파벳 피라미드.. 코드...

#define MAX 255

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

void main()
{
 char ch[MAX], save[MAX];


 memset(ch, 0, sizeof(ch));
 memset(save, 0, sizeof(save));

  while(1){
  fflush(stdin);
  gets(ch);
 
  if(ch == 0){
   break;
  }

  strcat(save, ch);
  puts(save);  
 }
}