char a[ 500] ,b[200] :
while(true)
printf ( "please input a string: In"):
gets(a):
int i,l=
, flag=l:
for(i=0:iel:i++)
¡f(alil==:")
break:
blil=alil:
blil=10:
l=strlen(b):
if(1<=1)
printf( "string is too short, input again! In"):
for(i=0:i<l2:i++)
if(blil! =
flag=0:
break:
if
printf( "yes In") :
else
printf("noln");
continue: