#includemain(){void action1(int,int),action2(int,int);char c;int a=1,b=3;c=getchar();switch(c){case'a':case'A':action1(a,b);break;case'b':case'B':action2(a,b);break;default:putchar('\a');}getch();}void action1(int x,int y){printf("x*y=%d",x*y);}void action2(int x,int y){printf("x+y=%d",x+y);}