Question

输入某同学的数学成绩,要求输入成绩等级A、B、C、D.

Answer 1

switch(x){

case 1:

if(x=90) {write(A); break;}

case 2:

if(x>=80){write(B);break;}

case 3:

if (x>=60){write(C);break;}

case 4:

if(x>=0){write(D);break;}

default:write(wrong) break;

}