以下程序的功能是根据输入的"y"（"Y")与"n"（"N"),在屏幕上分别显示出"This is YES."与"This is NO

以下程序的功能是根据输入的"y"("Y")与"n"("N"),在屏幕上分别显示出"This is YES."与"This is NO."。空白处需要填入的内容是 include＜stdio.h＞ void YesNo(char ch) { switch(ch) { case′y′: case′Y′: printf("\nThis is YES.\n"); case ′n′: case ′N′: printf("\nThis is NO.\n");} main() { char ch; printf("\nEnter a char y,Y or n,N:"); ch=【 】; printf(" ch;%c" ,ch); YesNo(ch); }