%ex2_2.m
arg=input('Input argument:');
total=0;detail=0;
%switch语句开始
switch arg
%分支1
case 1
i=1;
%外层while语句开始
while(i<=5)
total=total+1;
i=i+1;
j=1;
%内层while语句开始
while(j<=2);
detail=detail+total;
j=j+0.1;
%内层while语句结束
end
%外层while语句结束
end
%分支2
case 2
total=0;
detail=total;
%分支其他
case others
error('invalid arguments');
%switch语句结束
end
detail
