5_7.cpp

C程序参考,简单易懂,是初学者不可少的参考资料

#include<stdio.h>
main()
{
   char ch;
   printf("Please enter a character:\n");
   scanf("%c",&ch);
   ch=(ch>='A'&&ch<='Z')?'@':ch;
   printf("%c\n",ch);
}