11.28作业

#include 

using namespace std;

int main()
{
    string str1;
    getline(cin,str1);
    int a=0,b=0,c=0,d=0,e=0;
    for(int i=0;i<(int)str1.size();i++)
    {
        if(str1.at(i)>= 'a' && str1.at(i)<='z')
             a++;
        else if(str1.at(i)>= 'A' && str1.at(i)<='Z')
            b++;
        else if(str1.at(i)>= '0' && str1.at(i)<='9')
             c++;
        else  if(str1.at(i)==' ')
            d++;
        else
            e++;
     }
    cout << "小写:" << a << endl;
    cout << "大写:" << b << endl;
    cout << "数字:" << c << endl;
    cout << "空格:" << d << endl;
    cout << "其它:" << e << endl;
    return 0;
}