输入d，A，5后，下面程序执行结果为。#include void main(){char c;printf("please input a alphabet(c):");scanf("%c",&c);if(('a'<=c)&&(c<='z')){c=c-32;printf("%c",c);}else if(('A'<=c)&&(c<='Z')){c=c+32;printf("%c",c);}elseprintf("error!");}