int main()
{string str;cout << "输入字符串:";getline(cin,str);int size =str.size();int big = 0;int small = 0;int num = 0;int space = 0;int other = 0;for(int i=0;i<size;i++){if(str[i]<='Z'&&str[i]>='A'){big++;}else if(str[i]<='z'&&str[i]>='a'){small++;}else if(str[i]<='9'&&str[i]>='0'){num++;}else if(str[i]==' '){space++;}elseother++;}cout << "big=" << big << endl;cout << "small=" << small << endl;cout << "num=" << num << endl;cout << "space=" << space <<endl;cout << "other=" << other <<endl;return 0;
}