10.7C++作业

#include 

using namespace std;

int main()
{
   string str;
   cout << "请输入>>";
   getline(cin,str);
   cout << str <= 'A' && str.at(i) <= 'Z'){
            t1++; //大写字母
        }else if(str.at(i) >= 'a' && str.at(i) <= 'z'){
            t2++; //小写字母
        }else if(str.at(i) >= '0' && str.at(i) <= '9'){
            t3++;//数字
        }else if(' ' == str.at(i)){
            t4++; //空格
        }else{
            t5++;
        }
   }
   cout << "大写字母 " << t1 << " 个 " << endl;
   cout << "小写字母 " << t2 << " 个 " << endl;
   cout << "数字 " << t3 << " 个 " << endl;
   cout << "空格 " << t4 << " 个 " << endl;
   cout << "其他字符 " << t5 << " 个 " << endl;
   return 0;
}