The old lady donated a lot of money to the people in Yushu, who lost their homes in the earthquake,

_____ she is not rich .[ ]

A. if

B. though

C. because

D. but

有下列程序
#include＜stdio.h＞
main()
char c1，c2；
scanf("%c"&c1)；
while(c1＜65||c1＞90)scanf("%c"，&c1)；
c2=c1+32：
printf("%c，%c\n"，c1，c2)；

程序运行输入65回车后，能否输出结果、结束运行(请回答能或不能)______。