#include "stdio.h"
#include "conio.h"
void main()
{
int a[256],i,j,k,max; char str[256],*p; while ( 1 ) { for ( i=0;i<256;i++ ) a[i]=0;printf("請輸入字符串:"); gets(str); if ( str[0]=='0' ) break;
p=str;
while ( *p )
{ if ( (((*p)>='a')&&((*p)<='z'))||(((*p)>='A')&&((*p)<='Z')) ) a[(*p)]++;
?p++;
}
for ( i=max=0;i<256;i++ ) if ( max<a[i] ) max=a[i];
for ( i=1;i<=max;i++ )
?for ( j=0;j<256;j++ )
if ( a[j]==i )
?for ( k=0;k<i;k++ )
printf("%c",j);
printf("\n");
}MEND: printf("\n"); system("pause");
}