function  [tongji,bianhuan] = chengjitongji(inputchengji)
t=0;
tongji = zeros(1,5);
numb = max(size(inputchengji)); 
for k=1:numb
    bianhuan(k,:)='   ';
    if inputchengji(k) >= 90
        t = 1;
        bianhuan(k,:)='優(yōu) 秀';
    elseif inputchengji(k) >= 80
            t = 2;
            bianhuan(k,:)='良 好';
    elseif inputchengji(k) >= 70
            t = 3;
            bianhuan(k,:)='中 等';
    elseif inputchengji(k) >= 60
            t = 4;
            bianhuan(k,:) = '及 格';
    else
        t = 5;
        bianhuan(k,:)='不及格';
    end
    switch t
        case  1 
            tongji(1) = tongji(1) + 1; 
        case 2
            tongji(2) = tongji(2) + 1; 
        case 3
            tongji(3) = tongji(3) + 1; 
        case 4 
            tongji(4) = tongji(4) + 1 ;         
        case 5 
            tongji(5) = tongji(5) + 1; 
        otherwise
            disp('chengjichucuo');
    end 
end