2_6.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 c1,c2;
printf("Please input a letter:");
scanf("%c",&c1);
c2=c1+'A'-'a';
printf("%c\t%c\n",c1,c2); 
}