程序设计： 
#include "string.h" 
main() 
{char a[80][20],c[20]; 
int i=-1,j,k,n=-1; 
printf("Please enter a word string:\n"); 
do {i++; 
n++; 
scanf("%s",a[i]); 
} 
while (strcmp(a[i],"end")!=0); 
for (k=1;k<n;k++) 
for (j=n-1,i=0;i<n-k;i++,j--) 
if (strcmp(a[j],a[j-1])<0) 
{strcpy(c,a[j]); 
strcpy(a[j],a[j-1]); 
strcpy(a[j-1],c); 
} 
for (i=0;i<n;i++) 
printf("%s ",a[i]); 
printf("\n"); 
}