class Solution {
public:
bool isNumber(const char *str) {
int zhuang[9][6]={{-1,0,1,2,-1,3},
{-1,-1,-1,2,-1,3},
{-1,-1,-1,-1,-1,4},
{-1,5,-1,4,6,3},
{-1,5,-1,-1,6,4},
{-1,5,-1,-1,-1,-1},
{-1,-1,7,-1,-1,8},
{-1,-1,-1,-1,-1,8},
{-1,5,-1,-1,-1,8}},i,zhuangtai=0,jieshou;
for(i=0;str[i]!='\0';i++)
{
if(str[i]==' ')
jieshou=1;
else if(str[i]=='.')
jieshou=3;
else if('0'<=str[i]&&str[i]<='9')
jieshou=5;
else if(str[i]=='+'||str[i]=='-')
jieshou=2;
else if(str[i]=='e')
jieshou=4;
else
jieshou=0;
zhuangtai=zhuang[zhuangtai][jieshou];
if(zhuangtai==-1)
return false;
}
if(zhuangtai==3||zhuangtai==4||zhuangtai==5||zhuangtai==8)
return true;
else
return false;
}
};
