继续温度转换，这次换Switch实现
上一篇if else实现请移步 https://www.cnblogs.com/Wendows/p/14403443.html

温度转换 version 2.0

代码实现

%Temperature format conservation
% Version 2.0
loopflag = 1;       %循环标志位初始化
modeflag = 0;       %工作模式标志位初始化,默认不选择工作方式
vertips = 'TFC（version 2.0）';
disp(vertips);
tips = '模式0退出，模式1华氏温度转摄氏温度，模式2摄氏温度转华氏温度';
%modelflag==0退出，==1华氏温度转摄氏温度，==2摄氏温度转华氏温度
while(loopflag ~= 0)
    disp(tips);
    modeflag = input('Please select working mode(1 or 2):  ');
    modeflag = num2str(modeflag);
    switch modeflag
        case '1'
            Ftempin = input('Please type the temperature in F:  ');
            Ctemp = (Ftempin - 32)/1.8;
            Ctemp = num2str(Ctemp);
            outtips = 'The temperature in C is:  ';
            Ctempout = [outtips,Ctemp];
            disp(Ctempout);
            clearvars -except loopflag tips;
        case '2'
            Ctempin = input('Please type the temperature in C:  ');
            Ftemp = Ctempin*1.8+32;
            Ftemp = num2str(Ftemp);
            outtips = 'The temperature in F is:  ';
            Ftempout = [outtips,Ftemp];
            disp(Ftempout);
            clearvars -except loopflag tips;
        otherwise
            loopflag = 0;
            modeflag = 0;
    end
end
clear;

这里要说明的地方就一个，调用num2str()是为了匹配，这样可以识别判断除数字外的其他输入