#include <iostream>using namespace std;int main()
{string str;cout << "请输入一个字符串：" << endl;getline(cin,str);int size = str.size();int a=0,b=0,c=0,d=0,e=0;for(int i=0; i < size; i++){if(str.at(i) >= 'A' && str.at(i) <= 'Z'){a++;}else if(str.at(i) >= 'a' && str.at(i) <= 'z'){b++;}else if(str.at(i) >= '0' && str.at(i) <= '9'){c++;}else if(str.at(i) == ' '){d++;}else{e++;}}cout << "大写字母个数：" << a <<endl;cout << "小写字母个数：" << b <<endl;cout << "数字个数：" << c <<endl;cout << "空格个数：" << d <<endl;cout << "其他字符个数：" << e <<endl;return 0;
}